20748975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1637}}^1$

素因数の和:1676

約数の個数: 36

約数和(自身を含む): 37169496

約数和(自身を除く): 16420521

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 169, 195, 325, 507, 845, 975, 1637, 2535, 4225, 4911, 8185, 12675, 21281, 24555, 40925, 63843, 106405, 122775, 276653, 319215, 532025, 829959, 1383265, 1596075, 4149795, 6916325, 20748975]

約数ペア:

[(1, 20748975), (3, 6916325), (5, 4149795), (13, 1596075), (15, 1383265), (25, 829959), (39, 532025), (65, 319215), (75, 276653), (169, 122775), (195, 106405), (325, 63843), (507, 40925), (845, 24555), (975, 21281), (1637, 12675), (2535, 8185), (4225, 4911)]