21671671

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1$

素因数の和:295

約数の個数: 24

約数和(自身を含む): 26511840

約数和(自身を除く): 4840169

約数列:

[1, 7, 29, 49, 101, 151, 203, 707, 1057, 1421, 2929, 4379, 4949, 7399, 15251, 20503, 30653, 106757, 143521, 214571, 442279, 747299, 3095953, 21671671]

約数ペア:

[(1, 21671671), (7, 3095953), (29, 747299), (49, 442279), (101, 214571), (151, 143521), (203, 106757), (707, 30653), (1057, 20503), (1421, 15251), (2929, 7399), (4379, 4949)]