21605480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41549}}^1$

素因数の和:41573

約数の個数: 32

約数和(自身を含む): 52353000

約数和(自身を除く): 30747520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41549, 83098, 166196, 207745, 332392, 415490, 540137, 830980, 1080274, 1661960, 2160548, 2700685, 4321096, 5401370, 10802740, 21605480]

約数ペア:

[(1, 21605480), (2, 10802740), (4, 5401370), (5, 4321096), (8, 2700685), (10, 2160548), (13, 1661960), (20, 1080274), (26, 830980), (40, 540137), (52, 415490), (65, 332392), (104, 207745), (130, 166196), (260, 83098), (520, 41549)]