19416220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 42311808

約数和(自身を除く): 22895588

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 107, 172, 211, 214, 215, 422, 428, 430, 535, 844, 860, 1055, 1070, 2110, 2140, 4220, 4601, 9073, 9202, 18146, 18404, 22577, 23005, 36292, 45154, 45365, 46010, 90308, 90730, 92020, 112885, 181460, 225770, 451540, 970811, 1941622, 3883244, 4854055, 9708110, 19416220]

約数ペア:

[(1, 19416220), (2, 9708110), (4, 4854055), (5, 3883244), (10, 1941622), (20, 970811), (43, 451540), (86, 225770), (107, 181460), (172, 112885), (211, 92020), (214, 90730), (215, 90308), (422, 46010), (428, 45365), (430, 45154), (535, 36292), (844, 23005), (860, 22577), (1055, 18404), (1070, 18146), (2110, 9202), (2140, 9073), (4220, 4601)]