18987436

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 38779776

約数和(自身を除く): 19792340

約数列:

[1, 2, 4, 13, 17, 26, 34, 47, 52, 68, 94, 188, 221, 442, 457, 611, 799, 884, 914, 1222, 1598, 1828, 2444, 3196, 5941, 7769, 10387, 11882, 15538, 20774, 21479, 23764, 31076, 41548, 42958, 85916, 100997, 201994, 279227, 365143, 403988, 558454, 730286, 1116908, 1460572, 4746859, 9493718, 18987436]

約数ペア:

[(1, 18987436), (2, 9493718), (4, 4746859), (13, 1460572), (17, 1116908), (26, 730286), (34, 558454), (47, 403988), (52, 365143), (68, 279227), (94, 201994), (188, 100997), (221, 85916), (442, 42958), (457, 41548), (611, 31076), (799, 23764), (884, 21479), (914, 20774), (1222, 15538), (1598, 11882), (1828, 10387), (2444, 7769), (3196, 5941)]