31291815

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^2\times {\mathrm{73}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 55080864

約数和(自身を除く): 23789049

約数列:

[1, 3, 5, 15, 17, 41, 51, 73, 85, 123, 205, 219, 255, 365, 615, 697, 1095, 1241, 1681, 2091, 2993, 3485, 3723, 5043, 6205, 8405, 8979, 10455, 14965, 18615, 25215, 28577, 44895, 50881, 85731, 122713, 142885, 152643, 254405, 368139, 428655, 613565, 763215, 1840695, 2086121, 6258363, 10430605, 31291815]

約数ペア:

[(1, 31291815), (3, 10430605), (5, 6258363), (15, 2086121), (17, 1840695), (41, 763215), (51, 613565), (73, 428655), (85, 368139), (123, 254405), (205, 152643), (219, 142885), (255, 122713), (365, 85731), (615, 50881), (697, 44895), (1095, 28577), (1241, 25215), (1681, 18615), (2091, 14965), (2993, 10455), (3485, 8979), (3723, 8405), (5043, 6205)]