21866005

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2879}}^1$

素因数の和:2929

約数の個数: 24

約数和(自身を含む): 31518720

約数和(自身を除く): 9652715

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2879, 7595, 14395, 20153, 89249, 100765, 141071, 446245, 624743, 705355, 3123715, 4373201, 21866005]

約数ペア:

[(1, 21866005), (5, 4373201), (7, 3123715), (31, 705355), (35, 624743), (49, 446245), (155, 141071), (217, 100765), (245, 89249), (1085, 20153), (1519, 14395), (2879, 7595)]