21153730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12517}}^1$

素因数の和:12550

約数の個数: 24

約数和(自身を含む): 41234292

約数和(自身を除く): 20080562

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12517, 25034, 62585, 125170, 162721, 325442, 813605, 1627210, 2115373, 4230746, 10576865, 21153730]

約数ペア:

[(1, 21153730), (2, 10576865), (5, 4230746), (10, 2115373), (13, 1627210), (26, 813605), (65, 325442), (130, 162721), (169, 125170), (338, 62585), (845, 25034), (1690, 12517)]