21511750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6619}}^1$

素因数の和:6649

約数の個数: 32

約数和(自身を含む): 43374240

約数和(自身を除く): 21862490

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 6619, 13238, 33095, 66190, 86047, 165475, 172094, 330950, 430235, 827375, 860470, 1654750, 2151175, 4302350, 10755875, 21511750]

約数ペア:

[(1, 21511750), (2, 10755875), (5, 4302350), (10, 2151175), (13, 1654750), (25, 860470), (26, 827375), (50, 430235), (65, 330950), (125, 172094), (130, 165475), (250, 86047), (325, 66190), (650, 33095), (1625, 13238), (3250, 6619)]