20489080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1039}}^1$

素因数の和:1096

約数の個数: 64

約数和(自身を含む): 50544000

約数和(自身を除く): 30054920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 29, 34, 40, 58, 68, 85, 116, 136, 145, 170, 232, 290, 340, 493, 580, 680, 986, 1039, 1160, 1972, 2078, 2465, 3944, 4156, 4930, 5195, 8312, 9860, 10390, 17663, 19720, 20780, 30131, 35326, 41560, 60262, 70652, 88315, 120524, 141304, 150655, 176630, 241048, 301310, 353260, 512227, 602620, 706520, 1024454, 1205240, 2048908, 2561135, 4097816, 5122270, 10244540, 20489080]

約数ペア:

[(1, 20489080), (2, 10244540), (4, 5122270), (5, 4097816), (8, 2561135), (10, 2048908), (17, 1205240), (20, 1024454), (29, 706520), (34, 602620), (40, 512227), (58, 353260), (68, 301310), (85, 241048), (116, 176630), (136, 150655), (145, 141304), (170, 120524), (232, 88315), (290, 70652), (340, 60262), (493, 41560), (580, 35326), (680, 30131), (986, 20780), (1039, 19720), (1160, 17663), (1972, 10390), (2078, 9860), (2465, 8312), (3944, 5195), (4156, 4930)]