20505520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5231}}^1$

素因数の和:5258

約数の個数: 60

約数和(自身を含む): 55469664

約数和(自身を除く): 34964144

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5231, 10462, 20924, 26155, 36617, 41848, 52310, 73234, 83696, 104620, 146468, 183085, 209240, 256319, 292936, 366170, 418480, 512638, 585872, 732340, 1025276, 1281595, 1464680, 2050552, 2563190, 2929360, 4101104, 5126380, 10252760, 20505520]

約数ペア:

[(1, 20505520), (2, 10252760), (4, 5126380), (5, 4101104), (7, 2929360), (8, 2563190), (10, 2050552), (14, 1464680), (16, 1281595), (20, 1025276), (28, 732340), (35, 585872), (40, 512638), (49, 418480), (56, 366170), (70, 292936), (80, 256319), (98, 209240), (112, 183085), (140, 146468), (196, 104620), (245, 83696), (280, 73234), (392, 52310), (490, 41848), (560, 36617), (784, 26155), (980, 20924), (1960, 10462), (3920, 5231)]