21465028

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{113}}^1\times {\mathrm{281}}^1$

素因数の和:424

約数の個数: 36

約数和(自身を含む): 41181588

約数和(自身を除く): 19716560

約数列:

[1, 2, 4, 13, 26, 52, 113, 169, 226, 281, 338, 452, 562, 676, 1124, 1469, 2938, 3653, 5876, 7306, 14612, 19097, 31753, 38194, 47489, 63506, 76388, 94978, 127012, 189956, 412789, 825578, 1651156, 5366257, 10732514, 21465028]

約数ペア:

[(1, 21465028), (2, 10732514), (4, 5366257), (13, 1651156), (26, 825578), (52, 412789), (113, 189956), (169, 127012), (226, 94978), (281, 76388), (338, 63506), (452, 47489), (562, 38194), (676, 31753), (1124, 19097), (1469, 14612), (2938, 7306), (3653, 5876)]