20987328

素因数分解:

$2^6\times 3^1\times {\mathrm{281}}^1\times {\mathrm{389}}^1$

素因数の和:685

約数の個数: 56

約数和(自身を含む): 55869840

約数和(自身を除く): 34882512

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 192, 281, 389, 562, 778, 843, 1124, 1167, 1556, 1686, 2248, 2334, 3112, 3372, 4496, 4668, 6224, 6744, 8992, 9336, 12448, 13488, 17984, 18672, 24896, 26976, 37344, 53952, 74688, 109309, 218618, 327927, 437236, 655854, 874472, 1311708, 1748944, 2623416, 3497888, 5246832, 6995776, 10493664, 20987328]

約数ペア:

[(1, 20987328), (2, 10493664), (3, 6995776), (4, 5246832), (6, 3497888), (8, 2623416), (12, 1748944), (16, 1311708), (24, 874472), (32, 655854), (48, 437236), (64, 327927), (96, 218618), (192, 109309), (281, 74688), (389, 53952), (562, 37344), (778, 26976), (843, 24896), (1124, 18672), (1167, 17984), (1556, 13488), (1686, 12448), (2248, 9336), (2334, 8992), (3112, 6744), (3372, 6224), (4496, 4668)]