18900515

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{971}}^1$

素因数の和:1222

約数の個数: 16

約数和(自身を含む): 24144480

約数和(自身を除く): 5243965

約数列:

[1, 5, 17, 85, 229, 971, 1145, 3893, 4855, 16507, 19465, 82535, 222359, 1111795, 3780103, 18900515]

約数ペア:

[(1, 18900515), (5, 3780103), (17, 1111795), (85, 222359), (229, 82535), (971, 19465), (1145, 16507), (3893, 4855)]