9780781612

素因数分解:

$2^2\times 7^2\times {\mathrm{257}}^1\times {\mathrm{281}}^1\times {\mathrm{691}}^1$

素因数の和:1247

約数の個数: 72

約数和(自身を含む): 20088513648

約数和(自身を除く): 10307732036

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 257, 281, 514, 562, 691, 1028, 1124, 1382, 1799, 1967, 2764, 3598, 3934, 4837, 7196, 7868, 9674, 12593, 13769, 19348, 25186, 27538, 33859, 50372, 55076, 67718, 72217, 135436, 144434, 177587, 194171, 288868, 355174, 388342, 505519, 710348, 776684, 1011038, 1243109, 1359197, 2022076, 2486218, 2718394, 3538633, 4972436, 5436788, 7077266, 8701763, 9514379, 14154532, 17403526, 19028758, 34807052, 38057516, 49901947, 99803894, 199607788, 349313629, 698627258, 1397254516, 2445195403, 4890390806, 9780781612]

約数ペア:

[(1, 9780781612), (2, 4890390806), (4, 2445195403), (7, 1397254516), (14, 698627258), (28, 349313629), (49, 199607788), (98, 99803894), (196, 49901947), (257, 38057516), (281, 34807052), (514, 19028758), (562, 17403526), (691, 14154532), (1028, 9514379), (1124, 8701763), (1382, 7077266), (1799, 5436788), (1967, 4972436), (2764, 3538633), (3598, 2718394), (3934, 2486218), (4837, 2022076), (7196, 1359197), (7868, 1243109), (9674, 1011038), (12593, 776684), (13769, 710348), (19348, 505519), (25186, 388342), (27538, 355174), (33859, 288868), (50372, 194171), (55076, 177587), (67718, 144434), (72217, 135436)]