20497648

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{421}}^1$

素因数の和:625

約数の個数: 40

約数和(自身を含む): 42385680

約数和(自身を除く): 21888032

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 179, 272, 358, 421, 716, 842, 1432, 1684, 2864, 3043, 3368, 6086, 6736, 7157, 12172, 14314, 24344, 28628, 48688, 57256, 75359, 114512, 150718, 301436, 602872, 1205744, 1281103, 2562206, 5124412, 10248824, 20497648]

約数ペア:

[(1, 20497648), (2, 10248824), (4, 5124412), (8, 2562206), (16, 1281103), (17, 1205744), (34, 602872), (68, 301436), (136, 150718), (179, 114512), (272, 75359), (358, 57256), (421, 48688), (716, 28628), (842, 24344), (1432, 14314), (1684, 12172), (2864, 7157), (3043, 6736), (3368, 6086)]