128561960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{521}}^1$

素因数の和:762

約数の個数: 64

約数和(自身を含む): 300672000

約数和(自身を除く): 172110040

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 199, 248, 310, 398, 521, 620, 796, 995, 1042, 1240, 1592, 1990, 2084, 2605, 3980, 4168, 5210, 6169, 7960, 10420, 12338, 16151, 20840, 24676, 30845, 32302, 49352, 61690, 64604, 80755, 103679, 123380, 129208, 161510, 207358, 246760, 323020, 414716, 518395, 646040, 829432, 1036790, 2073580, 3214049, 4147160, 6428098, 12856196, 16070245, 25712392, 32140490, 64280980, 128561960]

約数ペア:

[(1, 128561960), (2, 64280980), (4, 32140490), (5, 25712392), (8, 16070245), (10, 12856196), (20, 6428098), (31, 4147160), (40, 3214049), (62, 2073580), (124, 1036790), (155, 829432), (199, 646040), (248, 518395), (310, 414716), (398, 323020), (521, 246760), (620, 207358), (796, 161510), (995, 129208), (1042, 123380), (1240, 103679), (1592, 80755), (1990, 64604), (2084, 61690), (2605, 49352), (3980, 32302), (4168, 30845), (5210, 24676), (6169, 20840), (7960, 16151), (10420, 12338)]