20835920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1283}}^1$

素因数の和:1332

約数の個数: 80

約数和(自身を含む): 57317760

約数和(自身を除く): 36481840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1283, 1624, 2030, 2320, 2566, 3248, 4060, 5132, 6415, 8120, 8981, 10264, 12830, 16240, 17962, 20528, 25660, 35924, 37207, 44905, 51320, 71848, 74414, 89810, 102640, 143696, 148828, 179620, 186035, 260449, 297656, 359240, 372070, 520898, 595312, 718480, 744140, 1041796, 1302245, 1488280, 2083592, 2604490, 2976560, 4167184, 5208980, 10417960, 20835920]

約数ペア:

[(1, 20835920), (2, 10417960), (4, 5208980), (5, 4167184), (7, 2976560), (8, 2604490), (10, 2083592), (14, 1488280), (16, 1302245), (20, 1041796), (28, 744140), (29, 718480), (35, 595312), (40, 520898), (56, 372070), (58, 359240), (70, 297656), (80, 260449), (112, 186035), (116, 179620), (140, 148828), (145, 143696), (203, 102640), (232, 89810), (280, 74414), (290, 71848), (406, 51320), (464, 44905), (560, 37207), (580, 35924), (812, 25660), (1015, 20528), (1160, 17962), (1283, 16240), (1624, 12830), (2030, 10264), (2320, 8981), (2566, 8120), (3248, 6415), (4060, 5132)]