21450720

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:137

約数の個数: 192

約数和(自身を含む): 74027520

約数和(自身を除く): 52576800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 29, 30, 32, 40, 46, 48, 58, 60, 67, 69, 80, 87, 92, 96, 115, 116, 120, 134, 138, 145, 160, 174, 184, 201, 230, 232, 240, 268, 276, 290, 335, 345, 348, 368, 402, 435, 460, 464, 480, 536, 552, 580, 667, 670, 690, 696, 736, 804, 870, 920, 928, 1005, 1072, 1104, 1160, 1334, 1340, 1380, 1392, 1541, 1608, 1740, 1840, 1943, 2001, 2010, 2144, 2208, 2320, 2668, 2680, 2760, 2784, 3082, 3216, 3335, 3480, 3680, 3886, 4002, 4020, 4623, 4640, 5336, 5360, 5520, 5829, 6164, 6432, 6670, 6960, 7705, 7772, 8004, 8040, 9246, 9715, 10005, 10672, 10720, 11040, 11658, 12328, 13340, 13920, 15410, 15544, 16008, 16080, 18492, 19430, 20010, 21344, 23115, 23316, 24656, 26680, 29145, 30820, 31088, 32016, 32160, 36984, 38860, 40020, 44689, 46230, 46632, 49312, 53360, 58290, 61640, 62176, 64032, 73968, 77720, 80040, 89378, 92460, 93264, 106720, 116580, 123280, 134067, 147936, 155440, 160080, 178756, 184920, 186528, 223445, 233160, 246560, 268134, 310880, 320160, 357512, 369840, 446890, 466320, 536268, 670335, 715024, 739680, 893780, 932640, 1072536, 1340670, 1430048, 1787560, 2145072, 2681340, 3575120, 4290144, 5362680, 7150240, 10725360, 21450720]

約数ペア:

[(1, 21450720), (2, 10725360), (3, 7150240), (4, 5362680), (5, 4290144), (6, 3575120), (8, 2681340), (10, 2145072), (12, 1787560), (15, 1430048), (16, 1340670), (20, 1072536), (23, 932640), (24, 893780), (29, 739680), (30, 715024), (32, 670335), (40, 536268), (46, 466320), (48, 446890), (58, 369840), (60, 357512), (67, 320160), (69, 310880), (80, 268134), (87, 246560), (92, 233160), (96, 223445), (115, 186528), (116, 184920), (120, 178756), (134, 160080), (138, 155440), (145, 147936), (160, 134067), (174, 123280), (184, 116580), (201, 106720), (230, 93264), (232, 92460), (240, 89378), (268, 80040), (276, 77720), (290, 73968), (335, 64032), (345, 62176), (348, 61640), (368, 58290), (402, 53360), (435, 49312), (460, 46632), (464, 46230), (480, 44689), (536, 40020), (552, 38860), (580, 36984), (667, 32160), (670, 32016), (690, 31088), (696, 30820), (736, 29145), (804, 26680), (870, 24656), (920, 23316), (928, 23115), (1005, 21344), (1072, 20010), (1104, 19430), (1160, 18492), (1334, 16080), (1340, 16008), (1380, 15544), (1392, 15410), (1541, 13920), (1608, 13340), (1740, 12328), (1840, 11658), (1943, 11040), (2001, 10720), (2010, 10672), (2144, 10005), (2208, 9715), (2320, 9246), (2668, 8040), (2680, 8004), (2760, 7772), (2784, 7705), (3082, 6960), (3216, 6670), (3335, 6432), (3480, 6164), (3680, 5829), (3886, 5520), (4002, 5360), (4020, 5336), (4623, 4640)]