21981990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{2341}}^1$

素因数の和:2664

約数の個数: 32

約数和(自身を含む): 52947936

約数和(自身を除く): 30965946

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 313, 626, 939, 1565, 1878, 2341, 3130, 4682, 4695, 7023, 9390, 11705, 14046, 23410, 35115, 70230, 732733, 1465466, 2198199, 3663665, 4396398, 7327330, 10990995, 21981990]

約数ペア:

[(1, 21981990), (2, 10990995), (3, 7327330), (5, 4396398), (6, 3663665), (10, 2198199), (15, 1465466), (30, 732733), (313, 70230), (626, 35115), (939, 23410), (1565, 14046), (1878, 11705), (2341, 9390), (3130, 7023), (4682, 4695)]