21091115

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{241}}^1\times {\mathrm{761}}^1$

素因数の和:1030

約数の個数: 16

約数和(自身を含む): 26554176

約数和(自身を除く): 5463061

約数列:

[1, 5, 23, 115, 241, 761, 1205, 3805, 5543, 17503, 27715, 87515, 183401, 917005, 4218223, 21091115]

約数ペア:

[(1, 21091115), (5, 4218223), (23, 917005), (115, 183401), (241, 87515), (761, 27715), (1205, 17503), (3805, 5543)]