20784996

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:545

約数の個数: 72

約数和(自身を含む): 55735680

約数和(自身を除く): 34950684

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 43, 58, 86, 87, 116, 129, 172, 174, 258, 261, 348, 387, 463, 516, 522, 774, 926, 1044, 1247, 1389, 1548, 1852, 2494, 2778, 3741, 4167, 4988, 5556, 7482, 8334, 11223, 13427, 14964, 16668, 19909, 22446, 26854, 39818, 40281, 44892, 53708, 59727, 79636, 80562, 119454, 120843, 161124, 179181, 238908, 241686, 358362, 483372, 577361, 716724, 1154722, 1732083, 2309444, 3464166, 5196249, 6928332, 10392498, 20784996]

約数ペア:

[(1, 20784996), (2, 10392498), (3, 6928332), (4, 5196249), (6, 3464166), (9, 2309444), (12, 1732083), (18, 1154722), (29, 716724), (36, 577361), (43, 483372), (58, 358362), (86, 241686), (87, 238908), (116, 179181), (129, 161124), (172, 120843), (174, 119454), (258, 80562), (261, 79636), (348, 59727), (387, 53708), (463, 44892), (516, 40281), (522, 39818), (774, 26854), (926, 22446), (1044, 19909), (1247, 16668), (1389, 14964), (1548, 13427), (1852, 11223), (2494, 8334), (2778, 7482), (3741, 5556), (4167, 4988)]