21607839

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2161}}^1$

素因数の和:2279

約数の個数: 24

約数和(自身を含む): 34401744

約数和(自身を除く): 12793905

約数列:

[1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 2161, 3333, 6483, 9999, 19449, 23771, 71313, 213939, 218261, 654783, 1964349, 2400871, 7202613, 21607839]

約数ペア:

[(1, 21607839), (3, 7202613), (9, 2400871), (11, 1964349), (33, 654783), (99, 218261), (101, 213939), (303, 71313), (909, 23771), (1111, 19449), (2161, 9999), (3333, 6483)]