20855716

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{491}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 43972992

約数和(自身を除く): 23117276

約数列:

[1, 2, 4, 7, 14, 28, 37, 41, 74, 82, 148, 164, 259, 287, 491, 518, 574, 982, 1036, 1148, 1517, 1964, 3034, 3437, 6068, 6874, 10619, 13748, 18167, 20131, 21238, 36334, 40262, 42476, 72668, 80524, 127169, 140917, 254338, 281834, 508676, 563668, 744847, 1489694, 2979388, 5213929, 10427858, 20855716]

約数ペア:

[(1, 20855716), (2, 10427858), (4, 5213929), (7, 2979388), (14, 1489694), (28, 744847), (37, 563668), (41, 508676), (74, 281834), (82, 254338), (148, 140917), (164, 127169), (259, 80524), (287, 72668), (491, 42476), (518, 40262), (574, 36334), (982, 21238), (1036, 20131), (1148, 18167), (1517, 13748), (1964, 10619), (3034, 6874), (3437, 6068)]