21229920

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:685

約数の個数: 144

約数和(自身を含む): 75714912

約数和(自身を除く): 54484992

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 207, 230, 240, 276, 288, 345, 360, 368, 414, 460, 480, 552, 641, 690, 720, 736, 828, 920, 1035, 1104, 1282, 1380, 1440, 1656, 1840, 1923, 2070, 2208, 2564, 2760, 3205, 3312, 3680, 3846, 4140, 5128, 5520, 5769, 6410, 6624, 7692, 8280, 9615, 10256, 11040, 11538, 12820, 14743, 15384, 16560, 19230, 20512, 23076, 25640, 28845, 29486, 30768, 33120, 38460, 44229, 46152, 51280, 57690, 58972, 61536, 73715, 76920, 88458, 92304, 102560, 115380, 117944, 132687, 147430, 153840, 176916, 184608, 221145, 230760, 235888, 265374, 294860, 307680, 353832, 442290, 461520, 471776, 530748, 589720, 663435, 707664, 884580, 923040, 1061496, 1179440, 1326870, 1415328, 1769160, 2122992, 2358880, 2653740, 3538320, 4245984, 5307480, 7076640, 10614960, 21229920]

約数ペア:

[(1, 21229920), (2, 10614960), (3, 7076640), (4, 5307480), (5, 4245984), (6, 3538320), (8, 2653740), (9, 2358880), (10, 2122992), (12, 1769160), (15, 1415328), (16, 1326870), (18, 1179440), (20, 1061496), (23, 923040), (24, 884580), (30, 707664), (32, 663435), (36, 589720), (40, 530748), (45, 471776), (46, 461520), (48, 442290), (60, 353832), (69, 307680), (72, 294860), (80, 265374), (90, 235888), (92, 230760), (96, 221145), (115, 184608), (120, 176916), (138, 153840), (144, 147430), (160, 132687), (180, 117944), (184, 115380), (207, 102560), (230, 92304), (240, 88458), (276, 76920), (288, 73715), (345, 61536), (360, 58972), (368, 57690), (414, 51280), (460, 46152), (480, 44229), (552, 38460), (641, 33120), (690, 30768), (720, 29486), (736, 28845), (828, 25640), (920, 23076), (1035, 20512), (1104, 19230), (1282, 16560), (1380, 15384), (1440, 14743), (1656, 12820), (1840, 11538), (1923, 11040), (2070, 10256), (2208, 9615), (2564, 8280), (2760, 7692), (3205, 6624), (3312, 6410), (3680, 5769), (3846, 5520), (4140, 5128)]