20870668

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{8191}}^1$

素因数の和:8222

約数の個数: 36

約数和(自身を含む): 45760512

約数和(自身を除く): 24889844

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 91, 98, 182, 196, 364, 637, 1274, 2548, 8191, 16382, 32764, 57337, 106483, 114674, 212966, 229348, 401359, 425932, 745381, 802718, 1490762, 1605436, 2981524, 5217667, 10435334, 20870668]

約数ペア:

[(1, 20870668), (2, 10435334), (4, 5217667), (7, 2981524), (13, 1605436), (14, 1490762), (26, 802718), (28, 745381), (49, 425932), (52, 401359), (91, 229348), (98, 212966), (182, 114674), (196, 106483), (364, 57337), (637, 32764), (1274, 16382), (2548, 8191)]