21487185

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 39157248

約数和(自身を除く): 17670063

約数列:

[1, 3, 5, 9, 15, 31, 45, 73, 93, 155, 211, 219, 279, 365, 465, 633, 657, 1055, 1095, 1395, 1899, 2263, 3165, 3285, 6541, 6789, 9495, 11315, 15403, 19623, 20367, 32705, 33945, 46209, 58869, 77015, 98115, 101835, 138627, 231045, 294345, 477493, 693135, 1432479, 2387465, 4297437, 7162395, 21487185]

約数ペア:

[(1, 21487185), (3, 7162395), (5, 4297437), (9, 2387465), (15, 1432479), (31, 693135), (45, 477493), (73, 294345), (93, 231045), (155, 138627), (211, 101835), (219, 98115), (279, 77015), (365, 58869), (465, 46209), (633, 33945), (657, 32705), (1055, 20367), (1095, 19623), (1395, 15403), (1899, 11315), (2263, 9495), (3165, 6789), (3285, 6541)]