21769825

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 34569216

約数和(自身を除く): 12799391

約数列:

[1, 5, 7, 11, 25, 35, 43, 55, 77, 175, 215, 263, 275, 301, 385, 473, 1075, 1315, 1505, 1841, 1925, 2365, 2893, 3311, 6575, 7525, 9205, 11309, 11825, 14465, 16555, 20251, 46025, 56545, 72325, 79163, 82775, 101255, 124399, 282725, 395815, 506275, 621995, 870793, 1979075, 3109975, 4353965, 21769825]

約数ペア:

[(1, 21769825), (5, 4353965), (7, 3109975), (11, 1979075), (25, 870793), (35, 621995), (43, 506275), (55, 395815), (77, 282725), (175, 124399), (215, 101255), (263, 82775), (275, 79163), (301, 72325), (385, 56545), (473, 46025), (1075, 20251), (1315, 16555), (1505, 14465), (1841, 11825), (1925, 11309), (2365, 9205), (2893, 7525), (3311, 6575)]