20103825

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{257}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 38390400

約数和(自身を除く): 18286575

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 149, 175, 257, 447, 525, 745, 771, 1043, 1285, 1799, 2235, 3129, 3725, 3855, 5215, 5397, 6425, 8995, 11175, 15645, 19275, 26075, 26985, 38293, 44975, 78225, 114879, 134925, 191465, 268051, 574395, 804153, 957325, 1340255, 2871975, 4020765, 6701275, 20103825]

約数ペア:

[(1, 20103825), (3, 6701275), (5, 4020765), (7, 2871975), (15, 1340255), (21, 957325), (25, 804153), (35, 574395), (75, 268051), (105, 191465), (149, 134925), (175, 114879), (257, 78225), (447, 44975), (525, 38293), (745, 26985), (771, 26075), (1043, 19275), (1285, 15645), (1799, 11175), (2235, 8995), (3129, 6425), (3725, 5397), (3855, 5215)]