21058904

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 40575600

約数和(自身を除く): 19516696

約数列:

[1, 2, 4, 8, 67, 101, 134, 202, 268, 389, 404, 536, 778, 808, 1556, 3112, 6767, 13534, 26063, 27068, 39289, 52126, 54136, 78578, 104252, 157156, 208504, 314312, 2632363, 5264726, 10529452, 21058904]

約数ペア:

[(1, 21058904), (2, 10529452), (4, 5264726), (8, 2632363), (67, 314312), (101, 208504), (134, 157156), (202, 104252), (268, 78578), (389, 54136), (404, 52126), (536, 39289), (778, 27068), (808, 26063), (1556, 13534), (3112, 6767)]