20350820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2383}}^1$

素因数の和:2460

約数の個数: 48

約数和(自身を含む): 49663488

約数和(自身を除く): 29312668

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2383, 4270, 4766, 8540, 9532, 11915, 16681, 23830, 33362, 47660, 66724, 83405, 145363, 166810, 290726, 333620, 581452, 726815, 1017541, 1453630, 2035082, 2907260, 4070164, 5087705, 10175410, 20350820]

約数ペア:

[(1, 20350820), (2, 10175410), (4, 5087705), (5, 4070164), (7, 2907260), (10, 2035082), (14, 1453630), (20, 1017541), (28, 726815), (35, 581452), (61, 333620), (70, 290726), (122, 166810), (140, 145363), (244, 83405), (305, 66724), (427, 47660), (610, 33362), (854, 23830), (1220, 16681), (1708, 11915), (2135, 9532), (2383, 8540), (4270, 4766)]