21728475

素因数分解:

$3^2\times 5^2\times {\mathrm{269}}^1\times {\mathrm{359}}^1$

素因数の和:644

約数の個数: 36

約数和(自身を含む): 39171600

約数和(自身を除く): 17443125

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 269, 359, 807, 1077, 1345, 1795, 2421, 3231, 4035, 5385, 6725, 8975, 12105, 16155, 20175, 26925, 60525, 80775, 96571, 289713, 482855, 869139, 1448565, 2414275, 4345695, 7242825, 21728475]

約数ペア:

[(1, 21728475), (3, 7242825), (5, 4345695), (9, 2414275), (15, 1448565), (25, 869139), (45, 482855), (75, 289713), (225, 96571), (269, 80775), (359, 60525), (807, 26925), (1077, 20175), (1345, 16155), (1795, 12105), (2421, 8975), (3231, 6725), (4035, 5385)]