20641980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{953}}^1$

素因数の和:1003

約数の個数: 72

約数和(自身を含む): 61063632

約数和(自身を除く): 40421652

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 190, 228, 285, 361, 380, 570, 722, 953, 1083, 1140, 1444, 1805, 1906, 2166, 2859, 3610, 3812, 4332, 4765, 5415, 5718, 7220, 9530, 10830, 11436, 14295, 18107, 19060, 21660, 28590, 36214, 54321, 57180, 72428, 90535, 108642, 181070, 217284, 271605, 344033, 362140, 543210, 688066, 1032099, 1086420, 1376132, 1720165, 2064198, 3440330, 4128396, 5160495, 6880660, 10320990, 20641980]

約数ペア:

[(1, 20641980), (2, 10320990), (3, 6880660), (4, 5160495), (5, 4128396), (6, 3440330), (10, 2064198), (12, 1720165), (15, 1376132), (19, 1086420), (20, 1032099), (30, 688066), (38, 543210), (57, 362140), (60, 344033), (76, 271605), (95, 217284), (114, 181070), (190, 108642), (228, 90535), (285, 72428), (361, 57180), (380, 54321), (570, 36214), (722, 28590), (953, 21660), (1083, 19060), (1140, 18107), (1444, 14295), (1805, 11436), (1906, 10830), (2166, 9530), (2859, 7220), (3610, 5718), (3812, 5415), (4332, 4765)]