640795920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{13417}}^1$

素因数の和:13632

約数の個数: 80

約数和(自身を含む): 1996598400

約数和(自身を除く): 1355802480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 199, 240, 398, 597, 796, 995, 1194, 1592, 1990, 2388, 2985, 3184, 3980, 4776, 5970, 7960, 9552, 11940, 13417, 15920, 23880, 26834, 40251, 47760, 53668, 67085, 80502, 107336, 134170, 161004, 201255, 214672, 268340, 322008, 402510, 536680, 644016, 805020, 1073360, 1610040, 2669983, 3220080, 5339966, 8009949, 10679932, 13349915, 16019898, 21359864, 26699830, 32039796, 40049745, 42719728, 53399660, 64079592, 80099490, 106799320, 128159184, 160198980, 213598640, 320397960, 640795920]

約数ペア:

[(1, 640795920), (2, 320397960), (3, 213598640), (4, 160198980), (5, 128159184), (6, 106799320), (8, 80099490), (10, 64079592), (12, 53399660), (15, 42719728), (16, 40049745), (20, 32039796), (24, 26699830), (30, 21359864), (40, 16019898), (48, 13349915), (60, 10679932), (80, 8009949), (120, 5339966), (199, 3220080), (240, 2669983), (398, 1610040), (597, 1073360), (796, 805020), (995, 644016), (1194, 536680), (1592, 402510), (1990, 322008), (2388, 268340), (2985, 214672), (3184, 201255), (3980, 161004), (4776, 134170), (5970, 107336), (7960, 80502), (9552, 67085), (11940, 53668), (13417, 47760), (15920, 40251), (23880, 26834)]