21765680

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3727}}^1$

素因数の和:3813

約数の個数: 40

約数和(自身を含む): 51312192

約数和(自身を除く): 29546512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3727, 5840, 7454, 14908, 18635, 29816, 37270, 59632, 74540, 149080, 272071, 298160, 544142, 1088284, 1360355, 2176568, 2720710, 4353136, 5441420, 10882840, 21765680]

約数ペア:

[(1, 21765680), (2, 10882840), (4, 5441420), (5, 4353136), (8, 2720710), (10, 2176568), (16, 1360355), (20, 1088284), (40, 544142), (73, 298160), (80, 272071), (146, 149080), (292, 74540), (365, 59632), (584, 37270), (730, 29816), (1168, 18635), (1460, 14908), (2920, 7454), (3727, 5840)]