20821440

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1$

素因数の和:107

約数の個数: 168

約数和(自身を含む): 70792848

約数和(自身を除く): 49971408

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 32, 40, 41, 46, 48, 60, 64, 69, 80, 82, 92, 96, 115, 120, 123, 138, 160, 164, 184, 192, 205, 230, 240, 246, 276, 320, 328, 345, 368, 410, 460, 480, 492, 529, 552, 615, 656, 690, 736, 820, 920, 943, 960, 984, 1058, 1104, 1230, 1312, 1380, 1472, 1587, 1640, 1840, 1886, 1968, 2116, 2208, 2460, 2624, 2645, 2760, 2829, 3174, 3280, 3680, 3772, 3936, 4232, 4416, 4715, 4920, 5290, 5520, 5658, 6348, 6560, 7360, 7544, 7872, 7935, 8464, 9430, 9840, 10580, 11040, 11316, 12696, 13120, 14145, 15088, 15870, 16928, 18860, 19680, 21160, 21689, 22080, 22632, 25392, 28290, 30176, 31740, 33856, 37720, 39360, 42320, 43378, 45264, 50784, 56580, 60352, 63480, 65067, 75440, 84640, 86756, 90528, 101568, 108445, 113160, 126960, 130134, 150880, 169280, 173512, 181056, 216890, 226320, 253920, 260268, 301760, 325335, 347024, 433780, 452640, 507840, 520536, 650670, 694048, 867560, 905280, 1041072, 1301340, 1388096, 1735120, 2082144, 2602680, 3470240, 4164288, 5205360, 6940480, 10410720, 20821440]

約数ペア:

[(1, 20821440), (2, 10410720), (3, 6940480), (4, 5205360), (5, 4164288), (6, 3470240), (8, 2602680), (10, 2082144), (12, 1735120), (15, 1388096), (16, 1301340), (20, 1041072), (23, 905280), (24, 867560), (30, 694048), (32, 650670), (40, 520536), (41, 507840), (46, 452640), (48, 433780), (60, 347024), (64, 325335), (69, 301760), (80, 260268), (82, 253920), (92, 226320), (96, 216890), (115, 181056), (120, 173512), (123, 169280), (138, 150880), (160, 130134), (164, 126960), (184, 113160), (192, 108445), (205, 101568), (230, 90528), (240, 86756), (246, 84640), (276, 75440), (320, 65067), (328, 63480), (345, 60352), (368, 56580), (410, 50784), (460, 45264), (480, 43378), (492, 42320), (529, 39360), (552, 37720), (615, 33856), (656, 31740), (690, 30176), (736, 28290), (820, 25392), (920, 22632), (943, 22080), (960, 21689), (984, 21160), (1058, 19680), (1104, 18860), (1230, 16928), (1312, 15870), (1380, 15088), (1472, 14145), (1587, 13120), (1640, 12696), (1840, 11316), (1886, 11040), (1968, 10580), (2116, 9840), (2208, 9430), (2460, 8464), (2624, 7935), (2645, 7872), (2760, 7544), (2829, 7360), (3174, 6560), (3280, 6348), (3680, 5658), (3772, 5520), (3936, 5290), (4232, 4920), (4416, 4715)]