21262740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{911}}^1$

素因数の和:1312

約数の個数: 48

約数和(自身を含む): 59754240

約数和(自身を除く): 38491500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 389, 778, 911, 1167, 1556, 1822, 1945, 2334, 2733, 3644, 3890, 4555, 4668, 5466, 5835, 7780, 9110, 10932, 11670, 13665, 18220, 23340, 27330, 54660, 354379, 708758, 1063137, 1417516, 1771895, 2126274, 3543790, 4252548, 5315685, 7087580, 10631370, 21262740]

約数ペア:

[(1, 21262740), (2, 10631370), (3, 7087580), (4, 5315685), (5, 4252548), (6, 3543790), (10, 2126274), (12, 1771895), (15, 1417516), (20, 1063137), (30, 708758), (60, 354379), (389, 54660), (778, 27330), (911, 23340), (1167, 18220), (1556, 13665), (1822, 11670), (1945, 10932), (2334, 9110), (2733, 7780), (3644, 5835), (3890, 5466), (4555, 4668)]