19992765

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 37691136

約数和(自身を除く): 17698371

約数列:

[1, 3, 5, 13, 15, 17, 37, 39, 51, 65, 85, 111, 163, 185, 195, 221, 255, 481, 489, 555, 629, 663, 815, 1105, 1443, 1887, 2119, 2405, 2445, 2771, 3145, 3315, 6031, 6357, 7215, 8177, 8313, 9435, 10595, 13855, 18093, 24531, 30155, 31785, 36023, 40885, 41565, 78403, 90465, 102527, 108069, 122655, 180115, 235209, 307581, 392015, 512635, 540345, 1176045, 1332851, 1537905, 3998553, 6664255, 19992765]

約数ペア:

[(1, 19992765), (3, 6664255), (5, 3998553), (13, 1537905), (15, 1332851), (17, 1176045), (37, 540345), (39, 512635), (51, 392015), (65, 307581), (85, 235209), (111, 180115), (163, 122655), (185, 108069), (195, 102527), (221, 90465), (255, 78403), (481, 41565), (489, 40885), (555, 36023), (629, 31785), (663, 30155), (815, 24531), (1105, 18093), (1443, 13855), (1887, 10595), (2119, 9435), (2405, 8313), (2445, 8177), (2771, 7215), (3145, 6357), (3315, 6031)]