189749780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{881}}^1$

素因数の和:1001

約数の個数: 72

約数和(自身を含む): 443416680

約数和(自身を除く): 253666900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 121, 178, 220, 242, 356, 445, 484, 605, 881, 890, 979, 1210, 1762, 1780, 1958, 2420, 3524, 3916, 4405, 4895, 8810, 9691, 9790, 10769, 17620, 19382, 19580, 21538, 38764, 43076, 48455, 53845, 78409, 96910, 106601, 107690, 156818, 193820, 213202, 215380, 313636, 392045, 426404, 533005, 784090, 862499, 1066010, 1568180, 1724998, 2132020, 3449996, 4312495, 8624990, 9487489, 17249980, 18974978, 37949956, 47437445, 94874890, 189749780]

約数ペア:

[(1, 189749780), (2, 94874890), (4, 47437445), (5, 37949956), (10, 18974978), (11, 17249980), (20, 9487489), (22, 8624990), (44, 4312495), (55, 3449996), (89, 2132020), (110, 1724998), (121, 1568180), (178, 1066010), (220, 862499), (242, 784090), (356, 533005), (445, 426404), (484, 392045), (605, 313636), (881, 215380), (890, 213202), (979, 193820), (1210, 156818), (1762, 107690), (1780, 106601), (1958, 96910), (2420, 78409), (3524, 53845), (3916, 48455), (4405, 43076), (4895, 38764), (8810, 21538), (9691, 19580), (9790, 19382), (10769, 17620)]