20005540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 44481024

約数和(自身を除く): 24475484

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 620, 787, 820, 1271, 1574, 2542, 3148, 3935, 5084, 6355, 7870, 12710, 15740, 24397, 25420, 32267, 48794, 64534, 97588, 121985, 129068, 161335, 243970, 322670, 487940, 645340, 1000277, 2000554, 4001108, 5001385, 10002770, 20005540]

約数ペア:

[(1, 20005540), (2, 10002770), (4, 5001385), (5, 4001108), (10, 2000554), (20, 1000277), (31, 645340), (41, 487940), (62, 322670), (82, 243970), (124, 161335), (155, 129068), (164, 121985), (205, 97588), (310, 64534), (410, 48794), (620, 32267), (787, 25420), (820, 24397), (1271, 15740), (1574, 12710), (2542, 7870), (3148, 6355), (3935, 5084)]