20709828

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:361

約数の個数: 72

約数和(自身を含む): 55036800

約数和(自身を除く): 34326972

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 83, 87, 116, 166, 174, 239, 249, 261, 332, 348, 478, 498, 522, 717, 747, 956, 996, 1044, 1434, 1494, 2151, 2407, 2868, 2988, 4302, 4814, 6931, 7221, 8604, 9628, 13862, 14442, 19837, 20793, 21663, 27724, 28884, 39674, 41586, 43326, 59511, 62379, 79348, 83172, 86652, 119022, 124758, 178533, 238044, 249516, 357066, 575273, 714132, 1150546, 1725819, 2301092, 3451638, 5177457, 6903276, 10354914, 20709828]

約数ペア:

[(1, 20709828), (2, 10354914), (3, 6903276), (4, 5177457), (6, 3451638), (9, 2301092), (12, 1725819), (18, 1150546), (29, 714132), (36, 575273), (58, 357066), (83, 249516), (87, 238044), (116, 178533), (166, 124758), (174, 119022), (239, 86652), (249, 83172), (261, 79348), (332, 62379), (348, 59511), (478, 43326), (498, 41586), (522, 39674), (717, 28884), (747, 27724), (956, 21663), (996, 20793), (1044, 19837), (1434, 14442), (1494, 13862), (2151, 9628), (2407, 8604), (2868, 7221), (2988, 6931), (4302, 4814)]