20900888

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{313}}^1\times {\mathrm{491}}^1$

素因数の和:827

約数の個数: 32

約数和(自身を含む): 41711760

約数和(自身を除く): 20810872

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 313, 491, 626, 982, 1252, 1964, 2504, 3928, 5321, 8347, 10642, 16694, 21284, 33388, 42568, 66776, 153683, 307366, 614732, 1229464, 2612611, 5225222, 10450444, 20900888]

約数ペア:

[(1, 20900888), (2, 10450444), (4, 5225222), (8, 2612611), (17, 1229464), (34, 614732), (68, 307366), (136, 153683), (313, 66776), (491, 42568), (626, 33388), (982, 21284), (1252, 16694), (1964, 10642), (2504, 8347), (3928, 5321)]