30720400

素因数分解:

$2^4\times 5^2\times {\mathrm{76801}}^1$

素因数の和:76819

約数の個数: 30

約数和(自身を含む): 73806722

約数和(自身を除く): 43086322

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 76801, 153602, 307204, 384005, 614408, 768010, 1228816, 1536020, 1920025, 3072040, 3840050, 6144080, 7680100, 15360200, 30720400]

約数ペア:

[(1, 30720400), (2, 15360200), (4, 7680100), (5, 6144080), (8, 3840050), (10, 3072040), (16, 1920025), (20, 1536020), (25, 1228816), (40, 768010), (50, 614408), (80, 384005), (100, 307204), (200, 153602), (400, 76801)]