21520695

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{4999}}^1$

素因数の和:5055

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 18799305

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 105, 123, 205, 287, 615, 861, 1435, 4305, 4999, 14997, 24995, 34993, 74985, 104979, 174965, 204959, 524895, 614877, 1024795, 1434713, 3074385, 4304139, 7173565, 21520695]

約数ペア:

[(1, 21520695), (3, 7173565), (5, 4304139), (7, 3074385), (15, 1434713), (21, 1024795), (35, 614877), (41, 524895), (105, 204959), (123, 174965), (205, 104979), (287, 74985), (615, 34993), (861, 24995), (1435, 14997), (4305, 4999)]