816277540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{19997}}^1$

素因数の和:20176

約数の個数: 48

約数和(自身を含む): 1857894192

約数和(自身を除く): 1041616652

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 628, 785, 1570, 2041, 3140, 4082, 8164, 10205, 19997, 20410, 39994, 40820, 79988, 99985, 199970, 259961, 399940, 519922, 1039844, 1299805, 2599610, 3139529, 5199220, 6279058, 12558116, 15697645, 31395290, 40813877, 62790580, 81627754, 163255508, 204069385, 408138770, 816277540]

約数ペア:

[(1, 816277540), (2, 408138770), (4, 204069385), (5, 163255508), (10, 81627754), (13, 62790580), (20, 40813877), (26, 31395290), (52, 15697645), (65, 12558116), (130, 6279058), (157, 5199220), (260, 3139529), (314, 2599610), (628, 1299805), (785, 1039844), (1570, 519922), (2041, 399940), (3140, 259961), (4082, 199970), (8164, 99985), (10205, 79988), (19997, 40820), (20410, 39994)]