21021637

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{541}}^1$

素因数の和:629

約数の個数: 24

約数和(自身を含む): 26815992

約数和(自身を除く): 5794355

約数列:

[1, 7, 13, 49, 61, 91, 427, 541, 637, 793, 2989, 3787, 5551, 7033, 26509, 33001, 38857, 49231, 231007, 344617, 429013, 1617049, 3003091, 21021637]

約数ペア:

[(1, 21021637), (7, 3003091), (13, 1617049), (49, 429013), (61, 344617), (91, 231007), (427, 49231), (541, 38857), (637, 33001), (793, 26509), (2989, 7033), (3787, 5551)]