21489428

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{4451}}^1$

素因数の和:4543

約数の個数: 24

約数和(自身を含む): 40388544

約数和(自身を除く): 18899116

約数列:

[1, 2, 4, 17, 34, 68, 71, 142, 284, 1207, 2414, 4451, 4828, 8902, 17804, 75667, 151334, 302668, 316021, 632042, 1264084, 5372357, 10744714, 21489428]

約数ペア:

[(1, 21489428), (2, 10744714), (4, 5372357), (17, 1264084), (34, 632042), (68, 316021), (71, 302668), (142, 151334), (284, 75667), (1207, 17804), (2414, 8902), (4451, 4828)]