211380520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{406501}}^1$

素因数の和:406525

約数の個数: 32

約数和(自身を含む): 512192520

約数和(自身を除く): 300812000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 406501, 813002, 1626004, 2032505, 3252008, 4065010, 5284513, 8130020, 10569026, 16260040, 21138052, 26422565, 42276104, 52845130, 105690260, 211380520]

約数ペア:

[(1, 211380520), (2, 105690260), (4, 52845130), (5, 42276104), (8, 26422565), (10, 21138052), (13, 16260040), (20, 10569026), (26, 8130020), (40, 5284513), (52, 4065010), (65, 3252008), (104, 2032505), (130, 1626004), (260, 813002), (520, 406501)]