18663280

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13723}}^1$

素因数の和:13753

約数の個数: 40

約数和(自身を含む): 45947952

約数和(自身を除く): 27284672

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13723, 27446, 54892, 68615, 109784, 137230, 219568, 233291, 274460, 466582, 548920, 933164, 1097840, 1166455, 1866328, 2332910, 3732656, 4665820, 9331640, 18663280]

約数ペア:

[(1, 18663280), (2, 9331640), (4, 4665820), (5, 3732656), (8, 2332910), (10, 1866328), (16, 1166455), (17, 1097840), (20, 933164), (34, 548920), (40, 466582), (68, 274460), (80, 233291), (85, 219568), (136, 137230), (170, 109784), (272, 68615), (340, 54892), (680, 27446), (1360, 13723)]