81861660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3581}}^1$

素因数の和:3723

約数の個数: 72

約数和(自身を含む): 250338816

約数和(自身を除く): 168477156

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 127, 180, 254, 381, 508, 635, 762, 1143, 1270, 1524, 1905, 2286, 2540, 3581, 3810, 4572, 5715, 7162, 7620, 10743, 11430, 14324, 17905, 21486, 22860, 32229, 35810, 42972, 53715, 64458, 71620, 107430, 128916, 161145, 214860, 322290, 454787, 644580, 909574, 1364361, 1819148, 2273935, 2728722, 4093083, 4547870, 5457444, 6821805, 8186166, 9095740, 13643610, 16372332, 20465415, 27287220, 40930830, 81861660]

約数ペア:

[(1, 81861660), (2, 40930830), (3, 27287220), (4, 20465415), (5, 16372332), (6, 13643610), (9, 9095740), (10, 8186166), (12, 6821805), (15, 5457444), (18, 4547870), (20, 4093083), (30, 2728722), (36, 2273935), (45, 1819148), (60, 1364361), (90, 909574), (127, 644580), (180, 454787), (254, 322290), (381, 214860), (508, 161145), (635, 128916), (762, 107430), (1143, 71620), (1270, 64458), (1524, 53715), (1905, 42972), (2286, 35810), (2540, 32229), (3581, 22860), (3810, 21486), (4572, 17905), (5715, 14324), (7162, 11430), (7620, 10743)]