21000259987

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{1499}}^1\times {\mathrm{117727}}^1$

素因数の和:119250

約数の個数: 16

約数和(自身を含む): 25429248000

約数和(自身を除く): 4428988013

約数列:

[1, 7, 17, 119, 1499, 10493, 25483, 117727, 178381, 824089, 2001359, 14009513, 176472773, 1235309411, 3000037141, 21000259987]

約数ペア:

[(1, 21000259987), (7, 3000037141), (17, 1235309411), (119, 176472773), (1499, 14009513), (10493, 2001359), (25483, 824089), (117727, 178381)]