19910618

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3529}}^1$

素因数の和:3582

約数の個数: 32

約数和(自身を含む): 37954560

約数和(自身を除く): 18043942

約数列:

[1, 2, 7, 13, 14, 26, 31, 62, 91, 182, 217, 403, 434, 806, 2821, 3529, 5642, 7058, 24703, 45877, 49406, 91754, 109399, 218798, 321139, 642278, 765793, 1422187, 1531586, 2844374, 9955309, 19910618]

約数ペア:

[(1, 19910618), (2, 9955309), (7, 2844374), (13, 1531586), (14, 1422187), (26, 765793), (31, 642278), (62, 321139), (91, 218798), (182, 109399), (217, 91754), (403, 49406), (434, 45877), (806, 24703), (2821, 7058), (3529, 5642)]