20905052

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{179}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 22559908

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 97, 172, 179, 194, 301, 358, 388, 602, 679, 716, 1204, 1253, 1358, 2506, 2716, 4171, 5012, 7697, 8342, 15394, 16684, 17363, 29197, 30788, 34726, 53879, 58394, 69452, 107758, 116788, 121541, 215516, 243082, 486164, 746609, 1493218, 2986436, 5226263, 10452526, 20905052]

約数ペア:

[(1, 20905052), (2, 10452526), (4, 5226263), (7, 2986436), (14, 1493218), (28, 746609), (43, 486164), (86, 243082), (97, 215516), (172, 121541), (179, 116788), (194, 107758), (301, 69452), (358, 58394), (388, 53879), (602, 34726), (679, 30788), (716, 29197), (1204, 17363), (1253, 16684), (1358, 15394), (2506, 8342), (2716, 7697), (4171, 5012)]