39728980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{461}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 86929920

約数和(自身を除く): 47200940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 278, 310, 461, 556, 620, 695, 922, 1390, 1844, 2305, 2780, 4309, 4610, 8618, 9220, 14291, 17236, 21545, 28582, 43090, 57164, 64079, 71455, 86180, 128158, 142910, 256316, 285820, 320395, 640790, 1281580, 1986449, 3972898, 7945796, 9932245, 19864490, 39728980]

約数ペア:

[(1, 39728980), (2, 19864490), (4, 9932245), (5, 7945796), (10, 3972898), (20, 1986449), (31, 1281580), (62, 640790), (124, 320395), (139, 285820), (155, 256316), (278, 142910), (310, 128158), (461, 86180), (556, 71455), (620, 64079), (695, 57164), (922, 43090), (1390, 28582), (1844, 21545), (2305, 17236), (2780, 14291), (4309, 9220), (4610, 8618)]