18845395

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 25039872

約数和(自身を除く): 6194477

約数列:

[1, 5, 23, 37, 43, 103, 115, 185, 215, 515, 851, 989, 1591, 2369, 3811, 4255, 4429, 4945, 7955, 11845, 19055, 22145, 36593, 87653, 101867, 163873, 182965, 438265, 509335, 819365, 3769079, 18845395]

約数ペア:

[(1, 18845395), (5, 3769079), (23, 819365), (37, 509335), (43, 438265), (103, 182965), (115, 163873), (185, 101867), (215, 87653), (515, 36593), (851, 22145), (989, 19055), (1591, 11845), (2369, 7955), (3811, 4945), (4255, 4429)]