21901815

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1291}}^1$

素因数の和:1344

約数の個数: 48

約数和(自身を含む): 42325920

約数和(自身を除く): 20424105

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 117, 145, 195, 261, 377, 435, 585, 1131, 1291, 1305, 1885, 3393, 3873, 5655, 6455, 11619, 16783, 16965, 19365, 37439, 50349, 58095, 83915, 112317, 151047, 187195, 251745, 336951, 486707, 561585, 755235, 1460121, 1684755, 2433535, 4380363, 7300605, 21901815]

約数ペア:

[(1, 21901815), (3, 7300605), (5, 4380363), (9, 2433535), (13, 1684755), (15, 1460121), (29, 755235), (39, 561585), (45, 486707), (65, 336951), (87, 251745), (117, 187195), (145, 151047), (195, 112317), (261, 83915), (377, 58095), (435, 50349), (585, 37439), (1131, 19365), (1291, 16965), (1305, 16783), (1885, 11619), (3393, 6455), (3873, 5655)]