21260140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2357}}^1$

素因数の和:2418

約数の個数: 48

約数和(自身を含む): 49914144

約数和(自身を除く): 28654004

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2357, 4510, 4714, 9020, 9428, 11785, 23570, 25927, 47140, 51854, 96637, 103708, 129635, 193274, 259270, 386548, 483185, 518540, 966370, 1063007, 1932740, 2126014, 4252028, 5315035, 10630070, 21260140]

約数ペア:

[(1, 21260140), (2, 10630070), (4, 5315035), (5, 4252028), (10, 2126014), (11, 1932740), (20, 1063007), (22, 966370), (41, 518540), (44, 483185), (55, 386548), (82, 259270), (110, 193274), (164, 129635), (205, 103708), (220, 96637), (410, 51854), (451, 47140), (820, 25927), (902, 23570), (1804, 11785), (2255, 9428), (2357, 9020), (4510, 4714)]