21393972

素因数分解:

$2^2\times 3^2\times {\mathrm{409}}^1\times {\mathrm{1453}}^1$

素因数の和:1872

約数の個数: 36

約数和(自身を含む): 54248740

約数和(自身を除く): 32854768

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 409, 818, 1227, 1453, 1636, 2454, 2906, 3681, 4359, 4908, 5812, 7362, 8718, 13077, 14724, 17436, 26154, 52308, 594277, 1188554, 1782831, 2377108, 3565662, 5348493, 7131324, 10696986, 21393972]

約数ペア:

[(1, 21393972), (2, 10696986), (3, 7131324), (4, 5348493), (6, 3565662), (9, 2377108), (12, 1782831), (18, 1188554), (36, 594277), (409, 52308), (818, 26154), (1227, 17436), (1453, 14724), (1636, 13077), (2454, 8718), (2906, 7362), (3681, 5812), (4359, 4908)]