21193835

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^2$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 29052240

約数和(自身を除く): 7858405

約数列:

[1, 5, 13, 19, 65, 95, 131, 247, 655, 1235, 1703, 2489, 8515, 12445, 17161, 32357, 85805, 161785, 223093, 326059, 1115465, 1630295, 4238767, 21193835]

約数ペア:

[(1, 21193835), (5, 4238767), (13, 1630295), (19, 1115465), (65, 326059), (95, 223093), (131, 161785), (247, 85805), (655, 32357), (1235, 17161), (1703, 12445), (2489, 8515)]