20801490

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 51701760

約数和(自身を除く): 30900270

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 67, 79, 131, 134, 158, 201, 237, 262, 335, 393, 395, 402, 474, 655, 670, 786, 790, 1005, 1185, 1310, 1965, 2010, 2370, 3930, 5293, 8777, 10349, 10586, 15879, 17554, 20698, 26331, 26465, 31047, 31758, 43885, 51745, 52662, 52930, 62094, 79395, 87770, 103490, 131655, 155235, 158790, 263310, 310470, 693383, 1386766, 2080149, 3466915, 4160298, 6933830, 10400745, 20801490]

約数ペア:

[(1, 20801490), (2, 10400745), (3, 6933830), (5, 4160298), (6, 3466915), (10, 2080149), (15, 1386766), (30, 693383), (67, 310470), (79, 263310), (131, 158790), (134, 155235), (158, 131655), (201, 103490), (237, 87770), (262, 79395), (335, 62094), (393, 52930), (395, 52662), (402, 51745), (474, 43885), (655, 31758), (670, 31047), (786, 26465), (790, 26331), (1005, 20698), (1185, 17554), (1310, 15879), (1965, 10586), (2010, 10349), (2370, 8777), (3930, 5293)]