21991544

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{461}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 42411600

約数和(自身を除く): 20420056

約数列:

[1, 2, 4, 8, 67, 89, 134, 178, 268, 356, 461, 536, 712, 922, 1844, 3688, 5963, 11926, 23852, 30887, 41029, 47704, 61774, 82058, 123548, 164116, 247096, 328232, 2748943, 5497886, 10995772, 21991544]

約数ペア:

[(1, 21991544), (2, 10995772), (4, 5497886), (8, 2748943), (67, 328232), (89, 247096), (134, 164116), (178, 123548), (268, 82058), (356, 61774), (461, 47704), (536, 41029), (712, 30887), (922, 23852), (1844, 11926), (3688, 5963)]