64280980

素因数分解:

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

素因数の和:760

約数の個数: 48

約数和(自身を含む): 140313600

約数和(自身を除く): 76032620

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 199, 310, 398, 521, 620, 796, 995, 1042, 1990, 2084, 2605, 3980, 5210, 6169, 10420, 12338, 16151, 24676, 30845, 32302, 61690, 64604, 80755, 103679, 123380, 161510, 207358, 323020, 414716, 518395, 1036790, 2073580, 3214049, 6428098, 12856196, 16070245, 32140490, 64280980]

約数ペア:

[(1, 64280980), (2, 32140490), (4, 16070245), (5, 12856196), (10, 6428098), (20, 3214049), (31, 2073580), (62, 1036790), (124, 518395), (155, 414716), (199, 323020), (310, 207358), (398, 161510), (521, 123380), (620, 103679), (796, 80755), (995, 64604), (1042, 61690), (1990, 32302), (2084, 30845), (2605, 24676), (3980, 16151), (5210, 12338), (6169, 10420)]