18191978

素因数分解:

$2^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{251}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 14322070

約数列:

[1, 2, 7, 14, 31, 62, 167, 217, 251, 334, 434, 502, 1169, 1757, 2338, 3514, 5177, 7781, 10354, 15562, 36239, 41917, 54467, 72478, 83834, 108934, 293419, 586838, 1299427, 2598854, 9095989, 18191978]

約数ペア:

[(1, 18191978), (2, 9095989), (7, 2598854), (14, 1299427), (31, 586838), (62, 293419), (167, 108934), (217, 83834), (251, 72478), (334, 54467), (434, 41917), (502, 36239), (1169, 15562), (1757, 10354), (2338, 7781), (3514, 5177)]