221321985

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{641513}}^1$

素因数の和:641544

約数の個数: 16

約数和(自身を含む): 369512064

約数和(自身を除く): 148190079

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 641513, 1924539, 3207565, 9622695, 14754799, 44264397, 73773995, 221321985]

約数ペア:

[(1, 221321985), (3, 73773995), (5, 44264397), (15, 14754799), (23, 9622695), (69, 3207565), (115, 1924539), (345, 641513)]