19720545

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{4397}}^1$

素因数の和:4441

約数の個数: 32

約数和(自身を含む): 35465472

約数和(自身を除く): 15744927

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4397, 4485, 13191, 21985, 57161, 65955, 101131, 171483, 285805, 303393, 505655, 857415, 1314703, 1516965, 3944109, 6573515, 19720545]

約数ペア:

[(1, 19720545), (3, 6573515), (5, 3944109), (13, 1516965), (15, 1314703), (23, 857415), (39, 505655), (65, 303393), (69, 285805), (115, 171483), (195, 101131), (299, 65955), (345, 57161), (897, 21985), (1495, 13191), (4397, 4485)]