18402220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{443}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 40578048

約数和(自身を除く): 22175828

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 155, 268, 310, 335, 443, 620, 670, 886, 1340, 1772, 2077, 2215, 4154, 4430, 8308, 8860, 10385, 13733, 20770, 27466, 29681, 41540, 54932, 59362, 68665, 118724, 137330, 148405, 274660, 296810, 593620, 920111, 1840222, 3680444, 4600555, 9201110, 18402220]

約数ペア:

[(1, 18402220), (2, 9201110), (4, 4600555), (5, 3680444), (10, 1840222), (20, 920111), (31, 593620), (62, 296810), (67, 274660), (124, 148405), (134, 137330), (155, 118724), (268, 68665), (310, 59362), (335, 54932), (443, 41540), (620, 29681), (670, 27466), (886, 20770), (1340, 13733), (1772, 10385), (2077, 8860), (2215, 8308), (4154, 4430)]