18185140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{331}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 39824064

約数和(自身を除く): 21638924

約数列:

[1, 2, 4, 5, 10, 20, 41, 67, 82, 134, 164, 205, 268, 331, 335, 410, 662, 670, 820, 1324, 1340, 1655, 2747, 3310, 5494, 6620, 10988, 13571, 13735, 22177, 27142, 27470, 44354, 54284, 54940, 67855, 88708, 110885, 135710, 221770, 271420, 443540, 909257, 1818514, 3637028, 4546285, 9092570, 18185140]

約数ペア:

[(1, 18185140), (2, 9092570), (4, 4546285), (5, 3637028), (10, 1818514), (20, 909257), (41, 443540), (67, 271420), (82, 221770), (134, 135710), (164, 110885), (205, 88708), (268, 67855), (331, 54940), (335, 54284), (410, 44354), (662, 27470), (670, 27142), (820, 22177), (1324, 13735), (1340, 13571), (1655, 10988), (2747, 6620), (3310, 5494)]