19891515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{487}}^1$

素因数の和:891

約数の個数: 32

約数和(自身を含む): 36541440

約数和(自身を除く): 16649925

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 389, 487, 1167, 1461, 1945, 2435, 2723, 3409, 5835, 7305, 8169, 10227, 13615, 17045, 40845, 51135, 189443, 568329, 947215, 1326101, 2841645, 3978303, 6630505, 19891515]

約数ペア:

[(1, 19891515), (3, 6630505), (5, 3978303), (7, 2841645), (15, 1326101), (21, 947215), (35, 568329), (105, 189443), (389, 51135), (487, 40845), (1167, 17045), (1461, 13615), (1945, 10227), (2435, 8169), (2723, 7305), (3409, 5835)]