20995268

素因数分解:

$2^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 22550332

約数列:

[1, 2, 4, 7, 14, 28, 59, 71, 118, 142, 179, 236, 284, 358, 413, 497, 716, 826, 994, 1253, 1652, 1988, 2506, 4189, 5012, 8378, 10561, 12709, 16756, 21122, 25418, 29323, 42244, 50836, 58646, 73927, 88963, 117292, 147854, 177926, 295708, 355852, 749831, 1499662, 2999324, 5248817, 10497634, 20995268]

約数ペア:

[(1, 20995268), (2, 10497634), (4, 5248817), (7, 2999324), (14, 1499662), (28, 749831), (59, 355852), (71, 295708), (118, 177926), (142, 147854), (179, 117292), (236, 88963), (284, 73927), (358, 58646), (413, 50836), (497, 42244), (716, 29323), (826, 25418), (994, 21122), (1253, 16756), (1652, 12709), (1988, 10561), (2506, 8378), (4189, 5012)]