20589555

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 38823840

約数和(自身を除く): 18234285

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 109, 147, 245, 257, 327, 545, 735, 763, 771, 1285, 1635, 1799, 2289, 3815, 3855, 5341, 5397, 8995, 11445, 12593, 16023, 26705, 26985, 28013, 37779, 62965, 80115, 84039, 140065, 188895, 196091, 420195, 588273, 980455, 1372637, 2941365, 4117911, 6863185, 20589555]

約数ペア:

[(1, 20589555), (3, 6863185), (5, 4117911), (7, 2941365), (15, 1372637), (21, 980455), (35, 588273), (49, 420195), (105, 196091), (109, 188895), (147, 140065), (245, 84039), (257, 80115), (327, 62965), (545, 37779), (735, 28013), (763, 26985), (771, 26705), (1285, 16023), (1635, 12593), (1799, 11445), (2289, 8995), (3815, 5397), (3855, 5341)]