21390660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{787}}^1$

素因数の和:953

約数の個数: 72

約数和(自身を含む): 65397696

約数和(自身を除く): 44007036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 151, 180, 302, 453, 604, 755, 787, 906, 1359, 1510, 1574, 1812, 2265, 2361, 2718, 3020, 3148, 3935, 4530, 4722, 5436, 6795, 7083, 7870, 9060, 9444, 11805, 13590, 14166, 15740, 23610, 27180, 28332, 35415, 47220, 70830, 118837, 141660, 237674, 356511, 475348, 594185, 713022, 1069533, 1188370, 1426044, 1782555, 2139066, 2376740, 3565110, 4278132, 5347665, 7130220, 10695330, 21390660]

約数ペア:

[(1, 21390660), (2, 10695330), (3, 7130220), (4, 5347665), (5, 4278132), (6, 3565110), (9, 2376740), (10, 2139066), (12, 1782555), (15, 1426044), (18, 1188370), (20, 1069533), (30, 713022), (36, 594185), (45, 475348), (60, 356511), (90, 237674), (151, 141660), (180, 118837), (302, 70830), (453, 47220), (604, 35415), (755, 28332), (787, 27180), (906, 23610), (1359, 15740), (1510, 14166), (1574, 13590), (1812, 11805), (2265, 9444), (2361, 9060), (2718, 7870), (3020, 7083), (3148, 6795), (3935, 5436), (4530, 4722)]