20520920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{883}}^1$

素因数の和:984

約数の個数: 64

約数和(自身を含む): 53464320

約数和(自身を除く): 32943400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 83, 140, 166, 280, 332, 415, 581, 664, 830, 883, 1162, 1660, 1766, 2324, 2905, 3320, 3532, 4415, 4648, 5810, 6181, 7064, 8830, 11620, 12362, 17660, 23240, 24724, 30905, 35320, 49448, 61810, 73289, 123620, 146578, 247240, 293156, 366445, 513023, 586312, 732890, 1026046, 1465780, 2052092, 2565115, 2931560, 4104184, 5130230, 10260460, 20520920]

約数ペア:

[(1, 20520920), (2, 10260460), (4, 5130230), (5, 4104184), (7, 2931560), (8, 2565115), (10, 2052092), (14, 1465780), (20, 1026046), (28, 732890), (35, 586312), (40, 513023), (56, 366445), (70, 293156), (83, 247240), (140, 146578), (166, 123620), (280, 73289), (332, 61810), (415, 49448), (581, 35320), (664, 30905), (830, 24724), (883, 23240), (1162, 17660), (1660, 12362), (1766, 11620), (2324, 8830), (2905, 7064), (3320, 6181), (3532, 5810), (4415, 4648)]