20911856

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1$

素因数の和:382

約数の個数: 80

約数和(自身を含む): 50472960

約数和(自身を除く): 29561104

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 31, 38, 56, 62, 76, 112, 124, 133, 152, 217, 248, 266, 304, 317, 434, 496, 532, 589, 634, 868, 1064, 1178, 1268, 1736, 2128, 2219, 2356, 2536, 3472, 4123, 4438, 4712, 5072, 6023, 8246, 8876, 9424, 9827, 12046, 16492, 17752, 19654, 24092, 32984, 35504, 39308, 42161, 48184, 65968, 68789, 78616, 84322, 96368, 137578, 157232, 168644, 186713, 275156, 337288, 373426, 550312, 674576, 746852, 1100624, 1306991, 1493704, 2613982, 2987408, 5227964, 10455928, 20911856]

約数ペア:

[(1, 20911856), (2, 10455928), (4, 5227964), (7, 2987408), (8, 2613982), (14, 1493704), (16, 1306991), (19, 1100624), (28, 746852), (31, 674576), (38, 550312), (56, 373426), (62, 337288), (76, 275156), (112, 186713), (124, 168644), (133, 157232), (152, 137578), (217, 96368), (248, 84322), (266, 78616), (304, 68789), (317, 65968), (434, 48184), (496, 42161), (532, 39308), (589, 35504), (634, 32984), (868, 24092), (1064, 19654), (1178, 17752), (1268, 16492), (1736, 12046), (2128, 9827), (2219, 9424), (2356, 8876), (2536, 8246), (3472, 6023), (4123, 5072), (4438, 4712)]