21629920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10399}}^1$

素因数の和:10427

約数の個数: 48

約数和(自身を含む): 55036800

約数和(自身を除く): 33406880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10399, 20798, 41596, 51995, 83192, 103990, 135187, 166384, 207980, 270374, 332768, 415960, 540748, 675935, 831920, 1081496, 1351870, 1663840, 2162992, 2703740, 4325984, 5407480, 10814960, 21629920]

約数ペア:

[(1, 21629920), (2, 10814960), (4, 5407480), (5, 4325984), (8, 2703740), (10, 2162992), (13, 1663840), (16, 1351870), (20, 1081496), (26, 831920), (32, 675935), (40, 540748), (52, 415960), (65, 332768), (80, 270374), (104, 207980), (130, 166384), (160, 135187), (208, 103990), (260, 83192), (416, 51995), (520, 41596), (1040, 20798), (2080, 10399)]