20081180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:715

約数の個数: 72

約数和(自身を含む): 50714496

約数和(自身を除く): 30633316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 434, 490, 620, 661, 868, 980, 1085, 1322, 1519, 2170, 2644, 3038, 3305, 4340, 4627, 6076, 6610, 7595, 9254, 13220, 15190, 18508, 20491, 23135, 30380, 32389, 40982, 46270, 64778, 81964, 92540, 102455, 129556, 143437, 161945, 204910, 286874, 323890, 409820, 573748, 647780, 717185, 1004059, 1434370, 2008118, 2868740, 4016236, 5020295, 10040590, 20081180]

約数ペア:

[(1, 20081180), (2, 10040590), (4, 5020295), (5, 4016236), (7, 2868740), (10, 2008118), (14, 1434370), (20, 1004059), (28, 717185), (31, 647780), (35, 573748), (49, 409820), (62, 323890), (70, 286874), (98, 204910), (124, 161945), (140, 143437), (155, 129556), (196, 102455), (217, 92540), (245, 81964), (310, 64778), (434, 46270), (490, 40982), (620, 32389), (661, 30380), (868, 23135), (980, 20491), (1085, 18508), (1322, 15190), (1519, 13220), (2170, 9254), (2644, 7595), (3038, 6610), (3305, 6076), (4340, 4627)]