18855280

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4447}}^1$

素因数の和:4513

約数の個数: 40

約数和(自身を含む): 44675712

約数和(自身を除く): 25820432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4447, 8894, 17788, 22235, 35576, 44470, 71152, 88940, 177880, 235691, 355760, 471382, 942764, 1178455, 1885528, 2356910, 3771056, 4713820, 9427640, 18855280]

約数ペア:

[(1, 18855280), (2, 9427640), (4, 4713820), (5, 3771056), (8, 2356910), (10, 1885528), (16, 1178455), (20, 942764), (40, 471382), (53, 355760), (80, 235691), (106, 177880), (212, 88940), (265, 71152), (424, 44470), (530, 35576), (848, 22235), (1060, 17788), (2120, 8894), (4240, 4447)]