19915642

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{1009}}^1$

素因数の和:1221

約数の個数: 16

約数和(自身を含む): 30542400

約数和(自身を除く): 10626758

約数列:

[1, 2, 71, 139, 142, 278, 1009, 2018, 9869, 19738, 71639, 140251, 143278, 280502, 9957821, 19915642]

約数ペア:

[(1, 19915642), (2, 9957821), (71, 280502), (139, 143278), (142, 140251), (278, 71639), (1009, 19738), (2018, 9869)]