257123920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{521}}^1$

素因数の和:764

約数の個数: 80

約数和(自身を含む): 621388800

約数和(自身を除く): 364264880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 199, 248, 310, 398, 496, 521, 620, 796, 995, 1042, 1240, 1592, 1990, 2084, 2480, 2605, 3184, 3980, 4168, 5210, 6169, 7960, 8336, 10420, 12338, 15920, 16151, 20840, 24676, 30845, 32302, 41680, 49352, 61690, 64604, 80755, 98704, 103679, 123380, 129208, 161510, 207358, 246760, 258416, 323020, 414716, 493520, 518395, 646040, 829432, 1036790, 1292080, 1658864, 2073580, 3214049, 4147160, 6428098, 8294320, 12856196, 16070245, 25712392, 32140490, 51424784, 64280980, 128561960, 257123920]

約数ペア:

[(1, 257123920), (2, 128561960), (4, 64280980), (5, 51424784), (8, 32140490), (10, 25712392), (16, 16070245), (20, 12856196), (31, 8294320), (40, 6428098), (62, 4147160), (80, 3214049), (124, 2073580), (155, 1658864), (199, 1292080), (248, 1036790), (310, 829432), (398, 646040), (496, 518395), (521, 493520), (620, 414716), (796, 323020), (995, 258416), (1042, 246760), (1240, 207358), (1592, 161510), (1990, 129208), (2084, 123380), (2480, 103679), (2605, 98704), (3184, 80755), (3980, 64604), (4168, 61690), (5210, 49352), (6169, 41680), (7960, 32302), (8336, 30845), (10420, 24676), (12338, 20840), (15920, 16151)]