21497985

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20771}}^1$

素因数の和:20805

約数の個数: 24

約数和(自身を含む): 38885184

約数和(自身を除く): 17387199

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20771, 62313, 103855, 186939, 311565, 477733, 934695, 1433199, 2388665, 4299597, 7165995, 21497985]

約数ペア:

[(1, 21497985), (3, 7165995), (5, 4299597), (9, 2388665), (15, 1433199), (23, 934695), (45, 477733), (69, 311565), (115, 186939), (207, 103855), (345, 62313), (1035, 20771)]