21450620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2971}}^1$

素因数の和:3018

約数の個数: 36

約数和(自身を含む): 47557944

約数和(自身を除く): 26107324

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2971, 3610, 5942, 7220, 11884, 14855, 29710, 56449, 59420, 112898, 225796, 282245, 564490, 1072531, 1128980, 2145062, 4290124, 5362655, 10725310, 21450620]

約数ペア:

[(1, 21450620), (2, 10725310), (4, 5362655), (5, 4290124), (10, 2145062), (19, 1128980), (20, 1072531), (38, 564490), (76, 282245), (95, 225796), (190, 112898), (361, 59420), (380, 56449), (722, 29710), (1444, 14855), (1805, 11884), (2971, 7220), (3610, 5942)]