221480020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{379}}^1\times {\mathrm{479}}^1$

素因数の和:928

約数の個数: 48

約数和(自身を含む): 474969600

約数和(自身を除く): 253489580

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 379, 479, 610, 758, 958, 1220, 1516, 1895, 1916, 2395, 3790, 4790, 7580, 9580, 23119, 29219, 46238, 58438, 92476, 115595, 116876, 146095, 181541, 231190, 292190, 363082, 462380, 584380, 726164, 907705, 1815410, 3630820, 11074001, 22148002, 44296004, 55370005, 110740010, 221480020]

約数ペア:

[(1, 221480020), (2, 110740010), (4, 55370005), (5, 44296004), (10, 22148002), (20, 11074001), (61, 3630820), (122, 1815410), (244, 907705), (305, 726164), (379, 584380), (479, 462380), (610, 363082), (758, 292190), (958, 231190), (1220, 181541), (1516, 146095), (1895, 116876), (1916, 115595), (2395, 92476), (3790, 58438), (4790, 46238), (7580, 29219), (9580, 23119)]