81320560

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:326

約数の個数: 80

約数和(自身を含む): 194987520

約数和(自身を除く): 113666960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 103, 139, 142, 206, 278, 284, 355, 412, 515, 556, 568, 695, 710, 824, 1030, 1112, 1136, 1390, 1420, 1648, 2060, 2224, 2780, 2840, 4120, 5560, 5680, 7313, 8240, 9869, 11120, 14317, 14626, 19738, 28634, 29252, 36565, 39476, 49345, 57268, 58504, 71585, 73130, 78952, 98690, 114536, 117008, 143170, 146260, 157904, 197380, 229072, 286340, 292520, 394760, 572680, 585040, 789520, 1016507, 1145360, 2033014, 4066028, 5082535, 8132056, 10165070, 16264112, 20330140, 40660280, 81320560]

約数ペア:

[(1, 81320560), (2, 40660280), (4, 20330140), (5, 16264112), (8, 10165070), (10, 8132056), (16, 5082535), (20, 4066028), (40, 2033014), (71, 1145360), (80, 1016507), (103, 789520), (139, 585040), (142, 572680), (206, 394760), (278, 292520), (284, 286340), (355, 229072), (412, 197380), (515, 157904), (556, 146260), (568, 143170), (695, 117008), (710, 114536), (824, 98690), (1030, 78952), (1112, 73130), (1136, 71585), (1390, 58504), (1420, 57268), (1648, 49345), (2060, 39476), (2224, 36565), (2780, 29252), (2840, 28634), (4120, 19738), (5560, 14626), (5680, 14317), (7313, 11120), (8240, 9869)]