21155875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:352

約数の個数: 32

約数和(自身を含む): 29143296

約数和(自身を除く): 7987421

約数列:

[1, 5, 13, 25, 47, 65, 125, 235, 277, 325, 611, 1175, 1385, 1625, 3055, 3601, 5875, 6925, 13019, 15275, 18005, 34625, 65095, 76375, 90025, 169247, 325475, 450125, 846235, 1627375, 4231175, 21155875]

約数ペア:

[(1, 21155875), (5, 4231175), (13, 1627375), (25, 846235), (47, 450125), (65, 325475), (125, 169247), (235, 90025), (277, 76375), (325, 65095), (611, 34625), (1175, 18005), (1385, 15275), (1625, 13019), (3055, 6925), (3601, 5875)]