21418340

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2753}}^1$

素因数の和:3151

約数の個数: 24

約数和(自身を含む): 45110520

約数和(自身を除く): 23692180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2753, 3890, 5506, 7780, 11012, 13765, 27530, 55060, 1070917, 2141834, 4283668, 5354585, 10709170, 21418340]

約数ペア:

[(1, 21418340), (2, 10709170), (4, 5354585), (5, 4283668), (10, 2141834), (20, 1070917), (389, 55060), (778, 27530), (1556, 13765), (1945, 11012), (2753, 7780), (3890, 5506)]