20531480

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 48176640

約数和(自身を除く): 27645160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 67, 94, 134, 163, 188, 235, 268, 326, 335, 376, 470, 536, 652, 670, 815, 940, 1304, 1340, 1630, 1880, 2680, 3149, 3260, 6298, 6520, 7661, 10921, 12596, 15322, 15745, 21842, 25192, 30644, 31490, 38305, 43684, 54605, 61288, 62980, 76610, 87368, 109210, 125960, 153220, 218420, 306440, 436840, 513287, 1026574, 2053148, 2566435, 4106296, 5132870, 10265740, 20531480]

約数ペア:

[(1, 20531480), (2, 10265740), (4, 5132870), (5, 4106296), (8, 2566435), (10, 2053148), (20, 1026574), (40, 513287), (47, 436840), (67, 306440), (94, 218420), (134, 153220), (163, 125960), (188, 109210), (235, 87368), (268, 76610), (326, 62980), (335, 61288), (376, 54605), (470, 43684), (536, 38305), (652, 31490), (670, 30644), (815, 25192), (940, 21842), (1304, 15745), (1340, 15322), (1630, 12596), (1880, 10921), (2680, 7661), (3149, 6520), (3260, 6298)]