21977080

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{9007}}^1$

素因数の和:9079

約数の個数: 32

約数和(自身を含む): 50264640

約数和(自身を除く): 28287560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 9007, 18014, 36028, 45035, 72056, 90070, 180140, 360280, 549427, 1098854, 2197708, 2747135, 4395416, 5494270, 10988540, 21977080]

約数ペア:

[(1, 21977080), (2, 10988540), (4, 5494270), (5, 4395416), (8, 2747135), (10, 2197708), (20, 1098854), (40, 549427), (61, 360280), (122, 180140), (244, 90070), (305, 72056), (488, 45035), (610, 36028), (1220, 18014), (2440, 9007)]