21138990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1$

素因数の和:437

約数の個数: 64

約数和(自身を含む): 54250560

約数和(自身を除く): 33111570

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 51, 85, 102, 170, 181, 229, 255, 362, 458, 510, 543, 687, 905, 1086, 1145, 1374, 1810, 2290, 2715, 3077, 3435, 3893, 5430, 6154, 6870, 7786, 9231, 11679, 15385, 18462, 19465, 23358, 30770, 38930, 41449, 46155, 58395, 82898, 92310, 116790, 124347, 207245, 248694, 414490, 621735, 704633, 1243470, 1409266, 2113899, 3523165, 4227798, 7046330, 10569495, 21138990]

約数ペア:

[(1, 21138990), (2, 10569495), (3, 7046330), (5, 4227798), (6, 3523165), (10, 2113899), (15, 1409266), (17, 1243470), (30, 704633), (34, 621735), (51, 414490), (85, 248694), (102, 207245), (170, 124347), (181, 116790), (229, 92310), (255, 82898), (362, 58395), (458, 46155), (510, 41449), (543, 38930), (687, 30770), (905, 23358), (1086, 19465), (1145, 18462), (1374, 15385), (1810, 11679), (2290, 9231), (2715, 7786), (3077, 6870), (3435, 6154), (3893, 5430)]