19987976

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{419}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 38556000

約数和(自身を除く): 18568024

約数列:

[1, 2, 4, 8, 67, 89, 134, 178, 268, 356, 419, 536, 712, 838, 1676, 3352, 5963, 11926, 23852, 28073, 37291, 47704, 56146, 74582, 112292, 149164, 224584, 298328, 2498497, 4996994, 9993988, 19987976]

約数ペア:

[(1, 19987976), (2, 9993988), (4, 4996994), (8, 2498497), (67, 298328), (89, 224584), (134, 149164), (178, 112292), (268, 74582), (356, 56146), (419, 47704), (536, 37291), (712, 28073), (838, 23852), (1676, 11926), (3352, 5963)]