20669236

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 43206912

約数和(自身を除く): 22537676

約数列:

[1, 2, 4, 7, 14, 28, 37, 71, 74, 142, 148, 259, 281, 284, 497, 518, 562, 994, 1036, 1124, 1967, 1988, 2627, 3934, 5254, 7868, 10397, 10508, 18389, 19951, 20794, 36778, 39902, 41588, 72779, 73556, 79804, 139657, 145558, 279314, 291116, 558628, 738187, 1476374, 2952748, 5167309, 10334618, 20669236]

約数ペア:

[(1, 20669236), (2, 10334618), (4, 5167309), (7, 2952748), (14, 1476374), (28, 738187), (37, 558628), (71, 291116), (74, 279314), (142, 145558), (148, 139657), (259, 79804), (281, 73556), (284, 72779), (497, 41588), (518, 39902), (562, 36778), (994, 20794), (1036, 19951), (1124, 18389), (1967, 10508), (1988, 10397), (2627, 7868), (3934, 5254)]