21101820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{8179}}^1$

素因数の和:8234

約数の個数: 48

約数和(自身を含む): 60466560

約数和(自身を除く): 39364740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 215, 258, 430, 516, 645, 860, 1290, 2580, 8179, 16358, 24537, 32716, 40895, 49074, 81790, 98148, 122685, 163580, 245370, 351697, 490740, 703394, 1055091, 1406788, 1758485, 2110182, 3516970, 4220364, 5275455, 7033940, 10550910, 21101820]

約数ペア:

[(1, 21101820), (2, 10550910), (3, 7033940), (4, 5275455), (5, 4220364), (6, 3516970), (10, 2110182), (12, 1758485), (15, 1406788), (20, 1055091), (30, 703394), (43, 490740), (60, 351697), (86, 245370), (129, 163580), (172, 122685), (215, 98148), (258, 81790), (430, 49074), (516, 40895), (645, 32716), (860, 24537), (1290, 16358), (2580, 8179)]