21273730

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:199

約数の個数: 48

約数和(自身を含む): 41477184

約数和(自身を除く): 20203454

約数列:

[1, 2, 5, 10, 19, 38, 71, 83, 95, 142, 166, 190, 355, 361, 415, 710, 722, 830, 1349, 1577, 1805, 2698, 3154, 3610, 5893, 6745, 7885, 11786, 13490, 15770, 25631, 29465, 29963, 51262, 58930, 59926, 111967, 128155, 149815, 223934, 256310, 299630, 559835, 1119670, 2127373, 4254746, 10636865, 21273730]

約数ペア:

[(1, 21273730), (2, 10636865), (5, 4254746), (10, 2127373), (19, 1119670), (38, 559835), (71, 299630), (83, 256310), (95, 223934), (142, 149815), (166, 128155), (190, 111967), (355, 59926), (361, 58930), (415, 51262), (710, 29963), (722, 29465), (830, 25631), (1349, 15770), (1577, 13490), (1805, 11786), (2698, 7885), (3154, 6745), (3610, 5893)]