81181160

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{257}}^1$

素因数の和:470

約数の個数: 64

約数和(自身を含む): 188082000

約数和(自身を除く): 106900840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 149, 212, 257, 265, 298, 424, 514, 530, 596, 745, 1028, 1060, 1192, 1285, 1490, 2056, 2120, 2570, 2980, 5140, 5960, 7897, 10280, 13621, 15794, 27242, 31588, 38293, 39485, 54484, 63176, 68105, 76586, 78970, 108968, 136210, 153172, 157940, 191465, 272420, 306344, 315880, 382930, 544840, 765860, 1531720, 2029529, 4059058, 8118116, 10147645, 16236232, 20295290, 40590580, 81181160]

約数ペア:

[(1, 81181160), (2, 40590580), (4, 20295290), (5, 16236232), (8, 10147645), (10, 8118116), (20, 4059058), (40, 2029529), (53, 1531720), (106, 765860), (149, 544840), (212, 382930), (257, 315880), (265, 306344), (298, 272420), (424, 191465), (514, 157940), (530, 153172), (596, 136210), (745, 108968), (1028, 78970), (1060, 76586), (1192, 68105), (1285, 63176), (1490, 54484), (2056, 39485), (2120, 38293), (2570, 31588), (2980, 27242), (5140, 15794), (5960, 13621), (7897, 10280)]