20450390

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1609}}^1$

素因数の和:1688

約数の個数: 32

約数和(自身を含む): 38949120

約数和(自身を除く): 18498730

約数列:

[1, 2, 5, 10, 31, 41, 62, 82, 155, 205, 310, 410, 1271, 1609, 2542, 3218, 6355, 8045, 12710, 16090, 49879, 65969, 99758, 131938, 249395, 329845, 498790, 659690, 2045039, 4090078, 10225195, 20450390]

約数ペア:

[(1, 20450390), (2, 10225195), (5, 4090078), (10, 2045039), (31, 659690), (41, 498790), (62, 329845), (82, 249395), (155, 131938), (205, 99758), (310, 65969), (410, 49879), (1271, 16090), (1609, 12710), (2542, 8045), (3218, 6355)]