20820080

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2683}}^1$

素因数の和:2793

約数の個数: 40

約数和(自身を含む): 48923952

約数和(自身を除く): 28103872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2683, 3880, 5366, 7760, 10732, 13415, 21464, 26830, 42928, 53660, 107320, 214640, 260251, 520502, 1041004, 1301255, 2082008, 2602510, 4164016, 5205020, 10410040, 20820080]

約数ペア:

[(1, 20820080), (2, 10410040), (4, 5205020), (5, 4164016), (8, 2602510), (10, 2082008), (16, 1301255), (20, 1041004), (40, 520502), (80, 260251), (97, 214640), (194, 107320), (388, 53660), (485, 42928), (776, 26830), (970, 21464), (1552, 13415), (1940, 10732), (2683, 7760), (3880, 5366)]