260221520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{4721}}^1$

素因数の和:4800

約数の個数: 80

約数和(自身を含む): 663988752

約数和(自身を除く): 403767232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 53, 65, 80, 104, 106, 130, 208, 212, 260, 265, 424, 520, 530, 689, 848, 1040, 1060, 1378, 2120, 2756, 3445, 4240, 4721, 5512, 6890, 9442, 11024, 13780, 18884, 23605, 27560, 37768, 47210, 55120, 61373, 75536, 94420, 122746, 188840, 245492, 250213, 306865, 377680, 490984, 500426, 613730, 981968, 1000852, 1227460, 1251065, 2001704, 2454920, 2502130, 3252769, 4003408, 4909840, 5004260, 6505538, 10008520, 13011076, 16263845, 20017040, 26022152, 32527690, 52044304, 65055380, 130110760, 260221520]

約数ペア:

[(1, 260221520), (2, 130110760), (4, 65055380), (5, 52044304), (8, 32527690), (10, 26022152), (13, 20017040), (16, 16263845), (20, 13011076), (26, 10008520), (40, 6505538), (52, 5004260), (53, 4909840), (65, 4003408), (80, 3252769), (104, 2502130), (106, 2454920), (130, 2001704), (208, 1251065), (212, 1227460), (260, 1000852), (265, 981968), (424, 613730), (520, 500426), (530, 490984), (689, 377680), (848, 306865), (1040, 250213), (1060, 245492), (1378, 188840), (2120, 122746), (2756, 94420), (3445, 75536), (4240, 61373), (4721, 55120), (5512, 47210), (6890, 37768), (9442, 27560), (11024, 23605), (13780, 18884)]