21255120

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{557}}^1$

素因数の和:629

約数の個数: 120

約数和(自身を含む): 72859176

約数和(自身を除く): 51604056

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 53, 60, 72, 80, 90, 106, 120, 144, 159, 180, 212, 240, 265, 318, 360, 424, 477, 530, 557, 636, 720, 795, 848, 954, 1060, 1114, 1272, 1590, 1671, 1908, 2120, 2228, 2385, 2544, 2785, 3180, 3342, 3816, 4240, 4456, 4770, 5013, 5570, 6360, 6684, 7632, 8355, 8912, 9540, 10026, 11140, 12720, 13368, 16710, 19080, 20052, 22280, 25065, 26736, 29521, 33420, 38160, 40104, 44560, 50130, 59042, 66840, 80208, 88563, 100260, 118084, 133680, 147605, 177126, 200520, 236168, 265689, 295210, 354252, 401040, 442815, 472336, 531378, 590420, 708504, 885630, 1062756, 1180840, 1328445, 1417008, 1771260, 2125512, 2361680, 2656890, 3542520, 4251024, 5313780, 7085040, 10627560, 21255120]

約数ペア:

[(1, 21255120), (2, 10627560), (3, 7085040), (4, 5313780), (5, 4251024), (6, 3542520), (8, 2656890), (9, 2361680), (10, 2125512), (12, 1771260), (15, 1417008), (16, 1328445), (18, 1180840), (20, 1062756), (24, 885630), (30, 708504), (36, 590420), (40, 531378), (45, 472336), (48, 442815), (53, 401040), (60, 354252), (72, 295210), (80, 265689), (90, 236168), (106, 200520), (120, 177126), (144, 147605), (159, 133680), (180, 118084), (212, 100260), (240, 88563), (265, 80208), (318, 66840), (360, 59042), (424, 50130), (477, 44560), (530, 40104), (557, 38160), (636, 33420), (720, 29521), (795, 26736), (848, 25065), (954, 22280), (1060, 20052), (1114, 19080), (1272, 16710), (1590, 13368), (1671, 12720), (1908, 11140), (2120, 10026), (2228, 9540), (2385, 8912), (2544, 8355), (2785, 7632), (3180, 6684), (3342, 6360), (3816, 5570), (4240, 5013), (4456, 4770)]