20999498

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{263}}^1$

素因数の和:398

約数の個数: 32

約数和(自身を含む): 35392896

約数和(自身を除く): 14393398

約数列:

[1, 2, 13, 26, 37, 74, 83, 166, 263, 481, 526, 962, 1079, 2158, 3071, 3419, 6142, 6838, 9731, 19462, 21829, 39923, 43658, 79846, 126503, 253006, 283777, 567554, 807673, 1615346, 10499749, 20999498]

約数ペア:

[(1, 20999498), (2, 10499749), (13, 1615346), (26, 807673), (37, 567554), (74, 283777), (83, 253006), (166, 126503), (263, 79846), (481, 43658), (526, 39923), (962, 21829), (1079, 19462), (2158, 9731), (3071, 6838), (3419, 6142)]