20805915

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{4639}}^1$

素因数の和:4683

約数の個数: 32

約数和(自身を含む): 37416960

約数和(自身を除く): 16611045

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4485, 4639, 13917, 23195, 60307, 69585, 106697, 180921, 301535, 320091, 533485, 904605, 1387061, 1600455, 4161183, 6935305, 20805915]

約数ペア:

[(1, 20805915), (3, 6935305), (5, 4161183), (13, 1600455), (15, 1387061), (23, 904605), (39, 533485), (65, 320091), (69, 301535), (115, 180921), (195, 106697), (299, 69585), (345, 60307), (897, 23195), (1495, 13917), (4485, 4639)]