17894860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 39019680

約数和(自身を除く): 21124820

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 139, 157, 164, 205, 278, 314, 410, 556, 628, 695, 785, 820, 1390, 1570, 2780, 3140, 5699, 6437, 11398, 12874, 21823, 22796, 25748, 28495, 32185, 43646, 56990, 64370, 87292, 109115, 113980, 128740, 218230, 436460, 894743, 1789486, 3578972, 4473715, 8947430, 17894860]

約数ペア:

[(1, 17894860), (2, 8947430), (4, 4473715), (5, 3578972), (10, 1789486), (20, 894743), (41, 436460), (82, 218230), (139, 128740), (157, 113980), (164, 109115), (205, 87292), (278, 64370), (314, 56990), (410, 43646), (556, 32185), (628, 28495), (695, 25748), (785, 22796), (820, 21823), (1390, 12874), (1570, 11398), (2780, 6437), (3140, 5699)]