21534520

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10987}}^1$

素因数の和:11012

約数の個数: 48

約数和(自身を含む): 56368440

約数和(自身を除く): 34833920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10987, 21974, 43948, 54935, 76909, 87896, 109870, 153818, 219740, 307636, 384545, 439480, 538363, 615272, 769090, 1076726, 1538180, 2153452, 2691815, 3076360, 4306904, 5383630, 10767260, 21534520]

約数ペア:

[(1, 21534520), (2, 10767260), (4, 5383630), (5, 4306904), (7, 3076360), (8, 2691815), (10, 2153452), (14, 1538180), (20, 1076726), (28, 769090), (35, 615272), (40, 538363), (49, 439480), (56, 384545), (70, 307636), (98, 219740), (140, 153818), (196, 109870), (245, 87896), (280, 76909), (392, 54935), (490, 43948), (980, 21974), (1960, 10987)]