87891965

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{313}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 123710976

約数和(自身を除く): 35819011

約数列:

[1, 5, 7, 35, 71, 113, 313, 355, 497, 565, 791, 1565, 2191, 2485, 3955, 8023, 10955, 22223, 35369, 40115, 56161, 111115, 155561, 176845, 247583, 280805, 777805, 1237915, 2511199, 12555995, 17578393, 87891965]

約数ペア:

[(1, 87891965), (5, 17578393), (7, 12555995), (35, 2511199), (71, 1237915), (113, 777805), (313, 280805), (355, 247583), (497, 176845), (565, 155561), (791, 111115), (1565, 56161), (2191, 40115), (2485, 35369), (3955, 22223), (8023, 10955)]