21098515

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{227}}^1\times {\mathrm{641}}^1$

素因数の和:902

約数の個数: 16

約数和(自身を含む): 26347680

約数和(自身を除く): 5249165

約数列:

[1, 5, 29, 145, 227, 641, 1135, 3205, 6583, 18589, 32915, 92945, 145507, 727535, 4219703, 21098515]

約数ペア:

[(1, 21098515), (5, 4219703), (29, 727535), (145, 145507), (227, 92945), (641, 32915), (1135, 18589), (3205, 6583)]