20943910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5197}}^1$

素因数の和:5248

約数の個数: 32

約数和(自身を含む): 41916672

約数和(自身を除く): 20972762

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 5197, 10394, 25985, 51970, 67561, 135122, 161107, 322214, 337805, 675610, 805535, 1611070, 2094391, 4188782, 10471955, 20943910]

約数ペア:

[(1, 20943910), (2, 10471955), (5, 4188782), (10, 2094391), (13, 1611070), (26, 805535), (31, 675610), (62, 337805), (65, 322214), (130, 161107), (155, 135122), (310, 67561), (403, 51970), (806, 25985), (2015, 10394), (4030, 5197)]