20290720

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4373}}^1$

素因数の和:4417

約数の個数: 48

約数和(自身を含む): 49601160

約数和(自身を除く): 29310440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4373, 4640, 8746, 17492, 21865, 34984, 43730, 69968, 87460, 126817, 139936, 174920, 253634, 349840, 507268, 634085, 699680, 1014536, 1268170, 2029072, 2536340, 4058144, 5072680, 10145360, 20290720]

約数ペア:

[(1, 20290720), (2, 10145360), (4, 5072680), (5, 4058144), (8, 2536340), (10, 2029072), (16, 1268170), (20, 1014536), (29, 699680), (32, 634085), (40, 507268), (58, 349840), (80, 253634), (116, 174920), (145, 139936), (160, 126817), (232, 87460), (290, 69968), (464, 43730), (580, 34984), (928, 21865), (1160, 17492), (2320, 8746), (4373, 4640)]