21003990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{100019}}^1$

素因数の和:100036

約数の個数: 32

約数和(自身を含む): 57611520

約数和(自身を除く): 36607530

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 100019, 200038, 300057, 500095, 600114, 700133, 1000190, 1400266, 1500285, 2100399, 3000570, 3500665, 4200798, 7001330, 10501995, 21003990]

約数ペア:

[(1, 21003990), (2, 10501995), (3, 7001330), (5, 4200798), (6, 3500665), (7, 3000570), (10, 2100399), (14, 1500285), (15, 1400266), (21, 1000190), (30, 700133), (35, 600114), (42, 500095), (70, 300057), (105, 200038), (210, 100019)]