20866503

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 35312640

約数和(自身を除く): 14446137

約数列:

[1, 3, 7, 19, 21, 31, 49, 57, 93, 133, 147, 217, 241, 399, 589, 651, 723, 931, 1519, 1687, 1767, 2793, 4123, 4557, 4579, 5061, 7471, 11809, 12369, 13737, 22413, 28861, 32053, 35427, 52297, 86583, 96159, 141949, 156891, 224371, 366079, 425847, 673113, 993643, 1098237, 2980929, 6955501, 20866503]

約数ペア:

[(1, 20866503), (3, 6955501), (7, 2980929), (19, 1098237), (21, 993643), (31, 673113), (49, 425847), (57, 366079), (93, 224371), (133, 156891), (147, 141949), (217, 96159), (241, 86583), (399, 52297), (589, 35427), (651, 32053), (723, 28861), (931, 22413), (1519, 13737), (1687, 12369), (1767, 11809), (2793, 7471), (4123, 5061), (4557, 4579)]