20416640

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:134

約数の個数: 128

約数和(自身を含む): 54345600

約数和(自身を除く): 33928960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 32, 38, 40, 46, 64, 73, 76, 80, 92, 95, 115, 128, 146, 152, 160, 184, 190, 230, 292, 304, 320, 365, 368, 380, 437, 460, 584, 608, 640, 730, 736, 760, 874, 920, 1168, 1216, 1387, 1460, 1472, 1520, 1679, 1748, 1840, 2185, 2336, 2432, 2774, 2920, 2944, 3040, 3358, 3496, 3680, 4370, 4672, 5548, 5840, 6080, 6716, 6935, 6992, 7360, 8395, 8740, 9344, 11096, 11680, 12160, 13432, 13870, 13984, 14720, 16790, 17480, 22192, 23360, 26864, 27740, 27968, 31901, 33580, 34960, 44384, 46720, 53728, 55480, 55936, 63802, 67160, 69920, 88768, 107456, 110960, 127604, 134320, 139840, 159505, 177536, 214912, 221920, 255208, 268640, 279680, 319010, 443840, 510416, 537280, 638020, 887680, 1020832, 1074560, 1276040, 2041664, 2552080, 4083328, 5104160, 10208320, 20416640]

約数ペア:

[(1, 20416640), (2, 10208320), (4, 5104160), (5, 4083328), (8, 2552080), (10, 2041664), (16, 1276040), (19, 1074560), (20, 1020832), (23, 887680), (32, 638020), (38, 537280), (40, 510416), (46, 443840), (64, 319010), (73, 279680), (76, 268640), (80, 255208), (92, 221920), (95, 214912), (115, 177536), (128, 159505), (146, 139840), (152, 134320), (160, 127604), (184, 110960), (190, 107456), (230, 88768), (292, 69920), (304, 67160), (320, 63802), (365, 55936), (368, 55480), (380, 53728), (437, 46720), (460, 44384), (584, 34960), (608, 33580), (640, 31901), (730, 27968), (736, 27740), (760, 26864), (874, 23360), (920, 22192), (1168, 17480), (1216, 16790), (1387, 14720), (1460, 13984), (1472, 13870), (1520, 13432), (1679, 12160), (1748, 11680), (1840, 11096), (2185, 9344), (2336, 8740), (2432, 8395), (2774, 7360), (2920, 6992), (2944, 6935), (3040, 6716), (3358, 6080), (3496, 5840), (3680, 5548), (4370, 4672)]