21891212

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{19069}}^1$

素因数の和:19121

約数の個数: 24

約数和(自身を含む): 44852640

約数和(自身を除く): 22961428

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 19069, 38138, 76276, 133483, 266966, 533932, 781829, 1563658, 3127316, 5472803, 10945606, 21891212]

約数ペア:

[(1, 21891212), (2, 10945606), (4, 5472803), (7, 3127316), (14, 1563658), (28, 781829), (41, 533932), (82, 266966), (164, 133483), (287, 76276), (574, 38138), (1148, 19069)]