21086415

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 43428528

約数和(自身を除く): 22342113

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 73, 105, 131, 147, 219, 245, 315, 365, 393, 441, 511, 655, 657, 735, 917, 1095, 1179, 1533, 1965, 2205, 2555, 2751, 3285, 3577, 4585, 4599, 5895, 6419, 7665, 8253, 9563, 10731, 13755, 17885, 19257, 22995, 28689, 32095, 32193, 41265, 47815, 53655, 57771, 66941, 86067, 96285, 143445, 160965, 200823, 288855, 334705, 430335, 468587, 602469, 1004115, 1405761, 2342935, 3012345, 4217283, 7028805, 21086415]

約数ペア:

[(1, 21086415), (3, 7028805), (5, 4217283), (7, 3012345), (9, 2342935), (15, 1405761), (21, 1004115), (35, 602469), (45, 468587), (49, 430335), (63, 334705), (73, 288855), (105, 200823), (131, 160965), (147, 143445), (219, 96285), (245, 86067), (315, 66941), (365, 57771), (393, 53655), (441, 47815), (511, 41265), (655, 32193), (657, 32095), (735, 28689), (917, 22995), (1095, 19257), (1179, 17885), (1533, 13755), (1965, 10731), (2205, 9563), (2555, 8253), (2751, 7665), (3285, 6419), (3577, 5895), (4585, 4599)]