20123940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{2251}}^1$

素因数の和:2412

約数の個数: 48

約数和(自身を含む): 56750400

約数和(自身を除く): 36626460

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 149, 298, 447, 596, 745, 894, 1490, 1788, 2235, 2251, 2980, 4470, 4502, 6753, 8940, 9004, 11255, 13506, 22510, 27012, 33765, 45020, 67530, 135060, 335399, 670798, 1006197, 1341596, 1676995, 2012394, 3353990, 4024788, 5030985, 6707980, 10061970, 20123940]

約数ペア:

[(1, 20123940), (2, 10061970), (3, 6707980), (4, 5030985), (5, 4024788), (6, 3353990), (10, 2012394), (12, 1676995), (15, 1341596), (20, 1006197), (30, 670798), (60, 335399), (149, 135060), (298, 67530), (447, 45020), (596, 33765), (745, 27012), (894, 22510), (1490, 13506), (1788, 11255), (2235, 9004), (2251, 8940), (2980, 6753), (4470, 4502)]