21131201

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{677}}^1$

素因数の和:718

約数の個数: 20

約数和(自身を含む): 26587092

約数和(自身を除く): 5455891

約数列:

[1, 7, 13, 49, 91, 343, 637, 677, 2401, 4459, 4739, 8801, 31213, 33173, 61607, 232211, 431249, 1625477, 3018743, 21131201]

約数ペア:

[(1, 21131201), (7, 3018743), (13, 1625477), (49, 431249), (91, 232211), (343, 61607), (637, 33173), (677, 31213), (2401, 8801), (4459, 4739)]