21828560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:316

約数の個数: 80

約数和(自身を含む): 55413120

約数和(自身を除く): 33584560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 139, 151, 208, 260, 278, 302, 520, 556, 604, 695, 755, 1040, 1112, 1208, 1390, 1510, 1807, 1963, 2224, 2416, 2780, 3020, 3614, 3926, 5560, 6040, 7228, 7852, 9035, 9815, 11120, 12080, 14456, 15704, 18070, 19630, 20989, 28912, 31408, 36140, 39260, 41978, 72280, 78520, 83956, 104945, 144560, 157040, 167912, 209890, 272857, 335824, 419780, 545714, 839560, 1091428, 1364285, 1679120, 2182856, 2728570, 4365712, 5457140, 10914280, 21828560]

約数ペア:

[(1, 21828560), (2, 10914280), (4, 5457140), (5, 4365712), (8, 2728570), (10, 2182856), (13, 1679120), (16, 1364285), (20, 1091428), (26, 839560), (40, 545714), (52, 419780), (65, 335824), (80, 272857), (104, 209890), (130, 167912), (139, 157040), (151, 144560), (208, 104945), (260, 83956), (278, 78520), (302, 72280), (520, 41978), (556, 39260), (604, 36140), (695, 31408), (755, 28912), (1040, 20989), (1112, 19630), (1208, 18070), (1390, 15704), (1510, 14456), (1807, 12080), (1963, 11120), (2224, 9815), (2416, 9035), (2780, 7852), (3020, 7228), (3614, 6040), (3926, 5560)]