21850017

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{461}}^1$

素因数の和:569

約数の個数: 32

約数和(自身を含む): 34831104

約数和(自身を除く): 12981087

約数列:

[1, 3, 7, 21, 37, 61, 111, 183, 259, 427, 461, 777, 1281, 1383, 2257, 3227, 6771, 9681, 15799, 17057, 28121, 47397, 51171, 84363, 119399, 196847, 358197, 590541, 1040477, 3121431, 7283339, 21850017]

約数ペア:

[(1, 21850017), (3, 7283339), (7, 3121431), (21, 1040477), (37, 590541), (61, 358197), (111, 196847), (183, 119399), (259, 84363), (427, 51171), (461, 47397), (777, 28121), (1281, 17057), (1383, 15799), (2257, 9681), (3227, 6771)]