19755554

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:267

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 20161246

約数列:

[1, 2, 7, 13, 14, 19, 26, 29, 38, 58, 91, 133, 182, 197, 203, 247, 266, 377, 394, 406, 494, 551, 754, 1102, 1379, 1729, 2561, 2639, 2758, 3458, 3743, 3857, 5122, 5278, 5713, 7163, 7486, 7714, 11426, 14326, 17927, 26201, 35854, 39991, 48659, 50141, 52402, 74269, 79982, 97318, 100282, 108547, 148538, 217094, 340613, 519883, 681226, 759829, 1039766, 1411111, 1519658, 2822222, 9877777, 19755554]

約数ペア:

[(1, 19755554), (2, 9877777), (7, 2822222), (13, 1519658), (14, 1411111), (19, 1039766), (26, 759829), (29, 681226), (38, 519883), (58, 340613), (91, 217094), (133, 148538), (182, 108547), (197, 100282), (203, 97318), (247, 79982), (266, 74269), (377, 52402), (394, 50141), (406, 48659), (494, 39991), (551, 35854), (754, 26201), (1102, 17927), (1379, 14326), (1729, 11426), (2561, 7714), (2639, 7486), (2758, 7163), (3458, 5713), (3743, 5278), (3857, 5122)]