20985735

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 36781056

約数和(自身を除く): 15795321

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 103, 141, 235, 255, 289, 309, 515, 705, 799, 867, 1445, 1545, 1751, 2397, 3995, 4335, 4841, 5253, 8755, 11985, 13583, 14523, 24205, 26265, 29767, 40749, 67915, 72615, 82297, 89301, 148835, 203745, 246891, 411485, 446505, 1234455, 1399049, 4197147, 6995245, 20985735]

約数ペア:

[(1, 20985735), (3, 6995245), (5, 4197147), (15, 1399049), (17, 1234455), (47, 446505), (51, 411485), (85, 246891), (103, 203745), (141, 148835), (235, 89301), (255, 82297), (289, 72615), (309, 67915), (515, 40749), (705, 29767), (799, 26265), (867, 24205), (1445, 14523), (1545, 13583), (1751, 11985), (2397, 8755), (3995, 5253), (4335, 4841)]