18911560

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6659}}^1$

素因数の和:6741

約数の個数: 32

約数和(自身を含む): 43156800

約数和(自身を除く): 24245240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6659, 13318, 26636, 33295, 53272, 66590, 133180, 266360, 472789, 945578, 1891156, 2363945, 3782312, 4727890, 9455780, 18911560]

約数ペア:

[(1, 18911560), (2, 9455780), (4, 4727890), (5, 3782312), (8, 2363945), (10, 1891156), (20, 945578), (40, 472789), (71, 266360), (142, 133180), (284, 66590), (355, 53272), (568, 33295), (710, 26636), (1420, 13318), (2840, 6659)]