21399338

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{5227}}^1$

素因数の和:5341

約数の個数: 16

約数和(自身を含む): 33877440

約数和(自身を除く): 12478102

約数列:

[1, 2, 23, 46, 89, 178, 2047, 4094, 5227, 10454, 120221, 240442, 465203, 930406, 10699669, 21399338]

約数ペア:

[(1, 21399338), (2, 10699669), (23, 930406), (46, 465203), (89, 240442), (178, 120221), (2047, 10454), (4094, 5227)]