21198813

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10734627

約数列:

[1, 3, 17, 19, 51, 57, 131, 167, 323, 393, 501, 969, 2227, 2489, 2839, 3173, 6681, 7467, 8517, 9519, 21877, 42313, 53941, 65631, 126939, 161823, 371909, 415663, 1115727, 1246989, 7066271, 21198813]

約数ペア:

[(1, 21198813), (3, 7066271), (17, 1246989), (19, 1115727), (51, 415663), (57, 371909), (131, 161823), (167, 126939), (323, 65631), (393, 53941), (501, 42313), (969, 21877), (2227, 9519), (2489, 8517), (2839, 7467), (3173, 6681)]