21591275

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{503}}^1$

素因数の和:631

約数の個数: 24

約数和(自身を含む): 28685664

約数和(自身を除く): 7094389

約数列:

[1, 5, 17, 25, 85, 101, 425, 503, 505, 1717, 2515, 2525, 8551, 8585, 12575, 42755, 42925, 50803, 213775, 254015, 863651, 1270075, 4318255, 21591275]

約数ペア:

[(1, 21591275), (5, 4318255), (17, 1270075), (25, 863651), (85, 254015), (101, 213775), (425, 50803), (503, 42925), (505, 42755), (1717, 12575), (2515, 8585), (2525, 8551)]