21455005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{811}}^1$

素因数の和:877

約数の個数: 32

約数和(自身を含む): 31102848

約数和(自身を除く): 9647843

約数列:

[1, 5, 11, 13, 37, 55, 65, 143, 185, 407, 481, 715, 811, 2035, 2405, 4055, 5291, 8921, 10543, 26455, 30007, 44605, 52715, 115973, 150035, 330077, 390091, 579865, 1650385, 1950455, 4291001, 21455005]

約数ペア:

[(1, 21455005), (5, 4291001), (11, 1950455), (13, 1650385), (37, 579865), (55, 390091), (65, 330077), (143, 150035), (185, 115973), (407, 52715), (481, 44605), (715, 30007), (811, 26455), (2035, 10543), (2405, 8921), (4055, 5291)]