19980856

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 45792000

約数和(自身を除く): 25811144

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 89, 133, 152, 178, 211, 266, 356, 422, 532, 623, 712, 844, 1064, 1246, 1477, 1688, 1691, 2492, 2954, 3382, 4009, 4984, 5908, 6764, 8018, 11816, 11837, 13528, 16036, 18779, 23674, 28063, 32072, 37558, 47348, 56126, 75116, 94696, 112252, 131453, 150232, 224504, 262906, 356801, 525812, 713602, 1051624, 1427204, 2497607, 2854408, 4995214, 9990428, 19980856]

約数ペア:

[(1, 19980856), (2, 9990428), (4, 4995214), (7, 2854408), (8, 2497607), (14, 1427204), (19, 1051624), (28, 713602), (38, 525812), (56, 356801), (76, 262906), (89, 224504), (133, 150232), (152, 131453), (178, 112252), (211, 94696), (266, 75116), (356, 56126), (422, 47348), (532, 37558), (623, 32072), (712, 28063), (844, 23674), (1064, 18779), (1246, 16036), (1477, 13528), (1688, 11837), (1691, 11816), (2492, 8018), (2954, 6764), (3382, 5908), (4009, 4984)]