21426020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13913}}^1$

素因数の和:13940

約数の個数: 48

約数和(自身を含む): 56101248

約数和(自身を除く): 34675228

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13913, 27826, 55652, 69565, 97391, 139130, 153043, 194782, 278260, 306086, 389564, 486955, 612172, 765215, 973910, 1071301, 1530430, 1947820, 2142602, 3060860, 4285204, 5356505, 10713010, 21426020]

約数ペア:

[(1, 21426020), (2, 10713010), (4, 5356505), (5, 4285204), (7, 3060860), (10, 2142602), (11, 1947820), (14, 1530430), (20, 1071301), (22, 973910), (28, 765215), (35, 612172), (44, 486955), (55, 389564), (70, 306086), (77, 278260), (110, 194782), (140, 153043), (154, 139130), (220, 97391), (308, 69565), (385, 55652), (770, 27826), (1540, 13913)]