21870875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:384

約数の個数: 32

約数和(自身を含む): 30174144

約数和(自身を除く): 8303269

約数列:

[1, 5, 13, 25, 43, 65, 125, 215, 313, 325, 559, 1075, 1565, 1625, 2795, 4069, 5375, 7825, 13459, 13975, 20345, 39125, 67295, 69875, 101725, 174967, 336475, 508625, 874835, 1682375, 4374175, 21870875]

約数ペア:

[(1, 21870875), (5, 4374175), (13, 1682375), (25, 874835), (43, 508625), (65, 336475), (125, 174967), (215, 101725), (313, 69875), (325, 67295), (559, 39125), (1075, 20345), (1565, 13975), (1625, 13459), (2795, 7825), (4069, 5375)]