30999920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{281}}^1$

素因数の和:498

約数の個数: 80

約数和(自身を含む): 83083968

約数和(自身を除く): 52084048

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 197, 280, 281, 394, 560, 562, 788, 985, 1124, 1379, 1405, 1576, 1967, 1970, 2248, 2758, 2810, 3152, 3934, 3940, 4496, 5516, 5620, 6895, 7868, 7880, 9835, 11032, 11240, 13790, 15736, 15760, 19670, 22064, 22480, 27580, 31472, 39340, 55160, 55357, 78680, 110320, 110714, 157360, 221428, 276785, 387499, 442856, 553570, 774998, 885712, 1107140, 1549996, 1937495, 2214280, 3099992, 3874990, 4428560, 6199984, 7749980, 15499960, 30999920]

約数ペア:

[(1, 30999920), (2, 15499960), (4, 7749980), (5, 6199984), (7, 4428560), (8, 3874990), (10, 3099992), (14, 2214280), (16, 1937495), (20, 1549996), (28, 1107140), (35, 885712), (40, 774998), (56, 553570), (70, 442856), (80, 387499), (112, 276785), (140, 221428), (197, 157360), (280, 110714), (281, 110320), (394, 78680), (560, 55357), (562, 55160), (788, 39340), (985, 31472), (1124, 27580), (1379, 22480), (1405, 22064), (1576, 19670), (1967, 15760), (1970, 15736), (2248, 13790), (2758, 11240), (2810, 11032), (3152, 9835), (3934, 7880), (3940, 7868), (4496, 6895), (5516, 5620)]