21005830

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{110557}}^1$

素因数の和:110583

約数の個数: 16

約数和(自身を含む): 39800880

約数和(自身を除く): 18795050

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 110557, 221114, 552785, 1105570, 2100583, 4201166, 10502915, 21005830]

約数ペア:

[(1, 21005830), (2, 10502915), (5, 4201166), (10, 2100583), (19, 1105570), (38, 552785), (95, 221114), (190, 110557)]