20878956

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2857}}^1$

素因数の和:2903

約数の個数: 72

約数和(自身を含む): 62418720

約数和(自身を除く): 41539764

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 29, 36, 42, 58, 63, 84, 87, 116, 126, 174, 203, 252, 261, 348, 406, 522, 609, 812, 1044, 1218, 1827, 2436, 2857, 3654, 5714, 7308, 8571, 11428, 17142, 19999, 25713, 34284, 39998, 51426, 59997, 79996, 82853, 102852, 119994, 165706, 179991, 239988, 248559, 331412, 359982, 497118, 579971, 719964, 745677, 994236, 1159942, 1491354, 1739913, 2319884, 2982708, 3479826, 5219739, 6959652, 10439478, 20878956]

約数ペア:

[(1, 20878956), (2, 10439478), (3, 6959652), (4, 5219739), (6, 3479826), (7, 2982708), (9, 2319884), (12, 1739913), (14, 1491354), (18, 1159942), (21, 994236), (28, 745677), (29, 719964), (36, 579971), (42, 497118), (58, 359982), (63, 331412), (84, 248559), (87, 239988), (116, 179991), (126, 165706), (174, 119994), (203, 102852), (252, 82853), (261, 79996), (348, 59997), (406, 51426), (522, 39998), (609, 34284), (812, 25713), (1044, 19999), (1218, 17142), (1827, 11428), (2436, 8571), (2857, 7308), (3654, 5714)]