400144

素因数分解:

$2^4\times {\mathrm{89}}^1\times {\mathrm{281}}^1$

素因数の和:378

約数の個数: 20

約数和(自身を含む): 786780

約数和(自身を除く): 386636

約数列:

[1, 2, 4, 8, 16, 89, 178, 281, 356, 562, 712, 1124, 1424, 2248, 4496, 25009, 50018, 100036, 200072, 400144]

約数ペア:

[(1, 400144), (2, 200072), (4, 100036), (8, 50018), (16, 25009), (89, 4496), (178, 2248), (281, 1424), (356, 1124), (562, 712)]