20945260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^2\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 52103520

約数和(自身を除く): 31158260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 89, 140, 164, 178, 205, 287, 356, 410, 445, 574, 623, 820, 890, 1148, 1246, 1435, 1681, 1780, 2492, 2870, 3115, 3362, 3649, 5740, 6230, 6724, 7298, 8405, 11767, 12460, 14596, 16810, 18245, 23534, 25543, 33620, 36490, 47068, 51086, 58835, 72980, 102172, 117670, 127715, 149609, 235340, 255430, 299218, 510860, 598436, 748045, 1047263, 1496090, 2094526, 2992180, 4189052, 5236315, 10472630, 20945260]

約数ペア:

[(1, 20945260), (2, 10472630), (4, 5236315), (5, 4189052), (7, 2992180), (10, 2094526), (14, 1496090), (20, 1047263), (28, 748045), (35, 598436), (41, 510860), (70, 299218), (82, 255430), (89, 235340), (140, 149609), (164, 127715), (178, 117670), (205, 102172), (287, 72980), (356, 58835), (410, 51086), (445, 47068), (574, 36490), (623, 33620), (820, 25543), (890, 23534), (1148, 18245), (1246, 16810), (1435, 14596), (1681, 12460), (1780, 11767), (2492, 8405), (2870, 7298), (3115, 6724), (3362, 6230), (3649, 5740)]