21287535

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61703}}^1$

素因数の和:61734

約数の個数: 16

約数和(自身を含む): 35541504

約数和(自身を除く): 14253969

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61703, 185109, 308515, 925545, 1419169, 4257507, 7095845, 21287535]

約数ペア:

[(1, 21287535), (3, 7095845), (5, 4257507), (15, 1419169), (23, 925545), (69, 308515), (115, 185109), (345, 61703)]