21279540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{4273}}^1$

素因数の和:4368

約数の個数: 48

約数和(自身を含む): 60314688

約数和(自身を除く): 39035148

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 83, 166, 249, 332, 415, 498, 830, 996, 1245, 1660, 2490, 4273, 4980, 8546, 12819, 17092, 21365, 25638, 42730, 51276, 64095, 85460, 128190, 256380, 354659, 709318, 1063977, 1418636, 1773295, 2127954, 3546590, 4255908, 5319885, 7093180, 10639770, 21279540]

約数ペア:

[(1, 21279540), (2, 10639770), (3, 7093180), (4, 5319885), (5, 4255908), (6, 3546590), (10, 2127954), (12, 1773295), (15, 1418636), (20, 1063977), (30, 709318), (60, 354659), (83, 256380), (166, 128190), (249, 85460), (332, 64095), (415, 51276), (498, 42730), (830, 25638), (996, 21365), (1245, 17092), (1660, 12819), (2490, 8546), (4273, 4980)]