400775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1$

素因数の和:91

約数の個数: 24

約数和(自身を含む): 562464

約数和(自身を除く): 161689

約数列:

[1, 5, 17, 23, 25, 41, 85, 115, 205, 391, 425, 575, 697, 943, 1025, 1955, 3485, 4715, 9775, 16031, 17425, 23575, 80155, 400775]

約数ペア:

[(1, 400775), (5, 80155), (17, 23575), (23, 17425), (25, 16031), (41, 9775), (85, 4715), (115, 3485), (205, 1955), (391, 1025), (425, 943), (575, 697)]