20903820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{701}}^1$

素因数の和:791

約数の個数: 96

約数和(自身を含む): 67931136

約数和(自身を除く): 47027316

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 71, 84, 105, 140, 142, 210, 213, 284, 355, 420, 426, 497, 701, 710, 852, 994, 1065, 1402, 1420, 1491, 1988, 2103, 2130, 2485, 2804, 2982, 3505, 4206, 4260, 4907, 4970, 5964, 7010, 7455, 8412, 9814, 9940, 10515, 14020, 14721, 14910, 19628, 21030, 24535, 29442, 29820, 42060, 49070, 49771, 58884, 73605, 98140, 99542, 147210, 149313, 199084, 248855, 294420, 298626, 348397, 497710, 597252, 696794, 746565, 995420, 1045191, 1393588, 1493130, 1741985, 2090382, 2986260, 3483970, 4180764, 5225955, 6967940, 10451910, 20903820]

約数ペア:

[(1, 20903820), (2, 10451910), (3, 6967940), (4, 5225955), (5, 4180764), (6, 3483970), (7, 2986260), (10, 2090382), (12, 1741985), (14, 1493130), (15, 1393588), (20, 1045191), (21, 995420), (28, 746565), (30, 696794), (35, 597252), (42, 497710), (60, 348397), (70, 298626), (71, 294420), (84, 248855), (105, 199084), (140, 149313), (142, 147210), (210, 99542), (213, 98140), (284, 73605), (355, 58884), (420, 49771), (426, 49070), (497, 42060), (701, 29820), (710, 29442), (852, 24535), (994, 21030), (1065, 19628), (1402, 14910), (1420, 14721), (1491, 14020), (1988, 10515), (2103, 9940), (2130, 9814), (2485, 8412), (2804, 7455), (2982, 7010), (3505, 5964), (4206, 4970), (4260, 4907)]