81350020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{2207}}^1$

素因数の和:2332

約数の個数: 48

約数和(自身を含む): 181762560

約数和(自身を除く): 100412540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 970, 1843, 1940, 2207, 3686, 4414, 7372, 8828, 9215, 11035, 18430, 22070, 36860, 41933, 44140, 83866, 167732, 209665, 214079, 419330, 428158, 838660, 856316, 1070395, 2140790, 4067501, 4281580, 8135002, 16270004, 20337505, 40675010, 81350020]

約数ペア:

[(1, 81350020), (2, 40675010), (4, 20337505), (5, 16270004), (10, 8135002), (19, 4281580), (20, 4067501), (38, 2140790), (76, 1070395), (95, 856316), (97, 838660), (190, 428158), (194, 419330), (380, 214079), (388, 209665), (485, 167732), (970, 83866), (1843, 44140), (1940, 41933), (2207, 36860), (3686, 22070), (4414, 18430), (7372, 11035), (8828, 9215)]