21317465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 7954855

約数列:

[1, 5, 13, 29, 43, 65, 145, 215, 263, 377, 559, 1247, 1315, 1885, 2795, 3419, 6235, 7627, 11309, 16211, 17095, 38135, 56545, 81055, 99151, 147017, 327961, 495755, 735085, 1639805, 4263493, 21317465]

約数ペア:

[(1, 21317465), (5, 4263493), (13, 1639805), (29, 735085), (43, 495755), (65, 327961), (145, 147017), (215, 99151), (263, 81055), (377, 56545), (559, 38135), (1247, 17095), (1315, 16211), (1885, 11309), (2795, 7627), (3419, 6235)]