21179908

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{6481}}^1$

素因数の和:6547

約数の個数: 24

約数和(自身を含む): 39929120

約数和(自身を除く): 18749212

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 817, 1634, 3268, 6481, 12962, 25924, 123139, 246278, 278683, 492556, 557366, 1114732, 5294977, 10589954, 21179908]

約数ペア:

[(1, 21179908), (2, 10589954), (4, 5294977), (19, 1114732), (38, 557366), (43, 492556), (76, 278683), (86, 246278), (172, 123139), (817, 25924), (1634, 12962), (3268, 6481)]