21711760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{283}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 58317696

約数和(自身を除く): 36605936

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 137, 140, 274, 280, 283, 548, 560, 566, 685, 959, 1096, 1132, 1370, 1415, 1918, 1981, 2192, 2264, 2740, 2830, 3836, 3962, 4528, 4795, 5480, 5660, 7672, 7924, 9590, 9905, 10960, 11320, 15344, 15848, 19180, 19810, 22640, 31696, 38360, 38771, 39620, 76720, 77542, 79240, 155084, 158480, 193855, 271397, 310168, 387710, 542794, 620336, 775420, 1085588, 1356985, 1550840, 2171176, 2713970, 3101680, 4342352, 5427940, 10855880, 21711760]

約数ペア:

[(1, 21711760), (2, 10855880), (4, 5427940), (5, 4342352), (7, 3101680), (8, 2713970), (10, 2171176), (14, 1550840), (16, 1356985), (20, 1085588), (28, 775420), (35, 620336), (40, 542794), (56, 387710), (70, 310168), (80, 271397), (112, 193855), (137, 158480), (140, 155084), (274, 79240), (280, 77542), (283, 76720), (548, 39620), (560, 38771), (566, 38360), (685, 31696), (959, 22640), (1096, 19810), (1132, 19180), (1370, 15848), (1415, 15344), (1918, 11320), (1981, 10960), (2192, 9905), (2264, 9590), (2740, 7924), (2830, 7672), (3836, 5660), (3962, 5480), (4528, 4795)]