20674920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{163}}^1$

素因数の和:335

約数の個数: 128

約数和(自身を含む): 71792640

約数和(自身を除く): 51117720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 151, 163, 168, 210, 280, 302, 326, 420, 453, 489, 604, 652, 755, 815, 840, 906, 978, 1057, 1141, 1208, 1304, 1510, 1630, 1812, 1956, 2114, 2265, 2282, 2445, 3020, 3171, 3260, 3423, 3624, 3912, 4228, 4530, 4564, 4890, 5285, 5705, 6040, 6342, 6520, 6846, 8456, 9060, 9128, 9780, 10570, 11410, 12684, 13692, 15855, 17115, 18120, 19560, 21140, 22820, 24613, 25368, 27384, 31710, 34230, 42280, 45640, 49226, 63420, 68460, 73839, 98452, 123065, 126840, 136920, 147678, 172291, 196904, 246130, 295356, 344582, 369195, 492260, 516873, 590712, 689164, 738390, 861455, 984520, 1033746, 1378328, 1476780, 1722910, 2067492, 2584365, 2953560, 3445820, 4134984, 5168730, 6891640, 10337460, 20674920]

約数ペア:

[(1, 20674920), (2, 10337460), (3, 6891640), (4, 5168730), (5, 4134984), (6, 3445820), (7, 2953560), (8, 2584365), (10, 2067492), (12, 1722910), (14, 1476780), (15, 1378328), (20, 1033746), (21, 984520), (24, 861455), (28, 738390), (30, 689164), (35, 590712), (40, 516873), (42, 492260), (56, 369195), (60, 344582), (70, 295356), (84, 246130), (105, 196904), (120, 172291), (140, 147678), (151, 136920), (163, 126840), (168, 123065), (210, 98452), (280, 73839), (302, 68460), (326, 63420), (420, 49226), (453, 45640), (489, 42280), (604, 34230), (652, 31710), (755, 27384), (815, 25368), (840, 24613), (906, 22820), (978, 21140), (1057, 19560), (1141, 18120), (1208, 17115), (1304, 15855), (1510, 13692), (1630, 12684), (1812, 11410), (1956, 10570), (2114, 9780), (2265, 9128), (2282, 9060), (2445, 8456), (3020, 6846), (3171, 6520), (3260, 6342), (3423, 6040), (3624, 5705), (3912, 5285), (4228, 4890), (4530, 4564)]