21229540

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6761}}^1$

素因数の和:6927

約数の個数: 24

約数和(自身を含む): 44872632

約数和(自身を除く): 23643092

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6761, 13522, 27044, 33805, 67610, 135220, 1061477, 2122954, 4245908, 5307385, 10614770, 21229540]

約数ペア:

[(1, 21229540), (2, 10614770), (4, 5307385), (5, 4245908), (10, 2122954), (20, 1061477), (157, 135220), (314, 67610), (628, 33805), (785, 27044), (1570, 13522), (3140, 6761)]