18665456

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{421}}^1$

素因数の和:609

約数の個数: 40

約数和(自身を含む): 38618064

約数和(自身を除く): 19952608

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 163, 272, 326, 421, 652, 842, 1304, 1684, 2608, 2771, 3368, 5542, 6736, 7157, 11084, 14314, 22168, 28628, 44336, 57256, 68623, 114512, 137246, 274492, 548984, 1097968, 1166591, 2333182, 4666364, 9332728, 18665456]

約数ペア:

[(1, 18665456), (2, 9332728), (4, 4666364), (8, 2333182), (16, 1166591), (17, 1097968), (34, 548984), (68, 274492), (136, 137246), (163, 114512), (272, 68623), (326, 57256), (421, 44336), (652, 28628), (842, 22168), (1304, 14314), (1684, 11084), (2608, 7157), (2771, 6736), (3368, 5542)]