81954340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{383}}^1\times {\mathrm{823}}^1$

素因数の和:1228

約数の個数: 48

約数和(自身を含む): 186052608

約数和(自身を除く): 104098268

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 383, 766, 823, 1532, 1646, 1915, 3292, 3830, 4115, 4979, 7660, 8230, 9958, 10699, 16460, 19916, 21398, 24895, 42796, 49790, 53495, 99580, 106990, 213980, 315209, 630418, 1260836, 1576045, 3152090, 4097717, 6304180, 8195434, 16390868, 20488585, 40977170, 81954340]

約数ペア:

[(1, 81954340), (2, 40977170), (4, 20488585), (5, 16390868), (10, 8195434), (13, 6304180), (20, 4097717), (26, 3152090), (52, 1576045), (65, 1260836), (130, 630418), (260, 315209), (383, 213980), (766, 106990), (823, 99580), (1532, 53495), (1646, 49790), (1915, 42796), (3292, 24895), (3830, 21398), (4115, 19916), (4979, 16460), (7660, 10699), (8230, 9958)]