12900890

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21149}}^1$

素因数の和:21217

約数の個数: 16

約数和(自身を含む): 23603400

約数和(自身を除く): 10702510

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 21149, 42298, 105745, 211490, 1290089, 2580178, 6450445, 12900890]

約数ペア:

[(1, 12900890), (2, 6450445), (5, 2580178), (10, 1290089), (61, 211490), (122, 105745), (305, 42298), (610, 21149)]