721540340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{4001}}^1$

素因数の和:4208

約数の個数: 48

約数和(自身を含む): 1549062144

約数和(自身を除く): 827521804

約数列:

[1, 2, 4, 5, 10, 20, 71, 127, 142, 254, 284, 355, 508, 635, 710, 1270, 1420, 2540, 4001, 8002, 9017, 16004, 18034, 20005, 36068, 40010, 45085, 80020, 90170, 180340, 284071, 508127, 568142, 1016254, 1136284, 1420355, 2032508, 2540635, 2840710, 5081270, 5681420, 10162540, 36077017, 72154034, 144308068, 180385085, 360770170, 721540340]

約数ペア:

[(1, 721540340), (2, 360770170), (4, 180385085), (5, 144308068), (10, 72154034), (20, 36077017), (71, 10162540), (127, 5681420), (142, 5081270), (254, 2840710), (284, 2540635), (355, 2032508), (508, 1420355), (635, 1136284), (710, 1016254), (1270, 568142), (1420, 508127), (2540, 284071), (4001, 180340), (8002, 90170), (9017, 80020), (16004, 45085), (18034, 40010), (20005, 36068)]