20122815

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 36827136

約数和(自身を除く): 16704321

約数列:

[1, 3, 5, 15, 17, 23, 47, 51, 69, 73, 85, 115, 141, 219, 235, 255, 345, 365, 391, 705, 799, 1081, 1095, 1173, 1241, 1679, 1955, 2397, 3243, 3431, 3723, 3995, 5037, 5405, 5865, 6205, 8395, 10293, 11985, 16215, 17155, 18377, 18615, 25185, 28543, 51465, 55131, 58327, 78913, 85629, 91885, 142715, 174981, 236739, 275655, 291635, 394565, 428145, 874905, 1183695, 1341521, 4024563, 6707605, 20122815]

約数ペア:

[(1, 20122815), (3, 6707605), (5, 4024563), (15, 1341521), (17, 1183695), (23, 874905), (47, 428145), (51, 394565), (69, 291635), (73, 275655), (85, 236739), (115, 174981), (141, 142715), (219, 91885), (235, 85629), (255, 78913), (345, 58327), (365, 55131), (391, 51465), (705, 28543), (799, 25185), (1081, 18615), (1095, 18377), (1173, 17155), (1241, 16215), (1679, 11985), (1955, 10293), (2397, 8395), (3243, 6205), (3431, 5865), (3723, 5405), (3995, 5037)]