21268840

素因数分解:

$2^3\times 5^1\times {\mathrm{619}}^1\times {\mathrm{859}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 47988000

約数和(自身を除く): 26719160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 619, 859, 1238, 1718, 2476, 3095, 3436, 4295, 4952, 6190, 6872, 8590, 12380, 17180, 24760, 34360, 531721, 1063442, 2126884, 2658605, 4253768, 5317210, 10634420, 21268840]

約数ペア:

[(1, 21268840), (2, 10634420), (4, 5317210), (5, 4253768), (8, 2658605), (10, 2126884), (20, 1063442), (40, 531721), (619, 34360), (859, 24760), (1238, 17180), (1718, 12380), (2476, 8590), (3095, 6872), (3436, 6190), (4295, 4952)]