19663749

素因数分解:

$3^3\times 7^2\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:279

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 14809851

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 89, 147, 167, 189, 267, 441, 501, 623, 801, 1169, 1323, 1503, 1869, 2403, 3507, 4361, 4509, 5607, 8183, 10521, 13083, 14863, 16821, 24549, 31563, 39249, 44589, 73647, 104041, 117747, 133767, 220941, 312123, 401301, 728287, 936369, 2184861, 2809107, 6554583, 19663749]

約数ペア:

[(1, 19663749), (3, 6554583), (7, 2809107), (9, 2184861), (21, 936369), (27, 728287), (49, 401301), (63, 312123), (89, 220941), (147, 133767), (167, 117747), (189, 104041), (267, 73647), (441, 44589), (501, 39249), (623, 31563), (801, 24549), (1169, 16821), (1323, 14863), (1503, 13083), (1869, 10521), (2403, 8183), (3507, 5607), (4361, 4509)]