18997947

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{457}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 28579200

約数和(自身を除く): 9581253

約数列:

[1, 3, 9, 31, 93, 149, 279, 447, 457, 1341, 1371, 4113, 4619, 13857, 14167, 41571, 42501, 68093, 127503, 204279, 612837, 2110883, 6332649, 18997947]

約数ペア:

[(1, 18997947), (3, 6332649), (9, 2110883), (31, 612837), (93, 204279), (149, 127503), (279, 68093), (447, 42501), (457, 41571), (1341, 14167), (1371, 13857), (4113, 4619)]