21407945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{277}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 29423520

約数和(自身を除く): 8015575

約数列:

[1, 5, 13, 29, 41, 65, 145, 205, 277, 377, 533, 1189, 1385, 1885, 2665, 3601, 5945, 8033, 11357, 15457, 18005, 40165, 56785, 77285, 104429, 147641, 329353, 522145, 738205, 1646765, 4281589, 21407945]

約数ペア:

[(1, 21407945), (5, 4281589), (13, 1646765), (29, 738205), (41, 522145), (65, 329353), (145, 147641), (205, 104429), (277, 77285), (377, 56785), (533, 40165), (1189, 18005), (1385, 15457), (1885, 11357), (2665, 8033), (3601, 5945)]