128416280

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 296524800

約数和(自身を除く): 168108520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 103, 142, 206, 284, 355, 412, 439, 515, 568, 710, 824, 878, 1030, 1420, 1756, 2060, 2195, 2840, 3512, 4120, 4390, 7313, 8780, 14626, 17560, 29252, 31169, 36565, 45217, 58504, 62338, 73130, 90434, 124676, 146260, 155845, 180868, 226085, 249352, 292520, 311690, 361736, 452170, 623380, 904340, 1246760, 1808680, 3210407, 6420814, 12841628, 16052035, 25683256, 32104070, 64208140, 128416280]

約数ペア:

[(1, 128416280), (2, 64208140), (4, 32104070), (5, 25683256), (8, 16052035), (10, 12841628), (20, 6420814), (40, 3210407), (71, 1808680), (103, 1246760), (142, 904340), (206, 623380), (284, 452170), (355, 361736), (412, 311690), (439, 292520), (515, 249352), (568, 226085), (710, 180868), (824, 155845), (878, 146260), (1030, 124676), (1420, 90434), (1756, 73130), (2060, 62338), (2195, 58504), (2840, 45217), (3512, 36565), (4120, 31169), (4390, 29252), (7313, 17560), (8780, 14626)]