21410620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13903}}^1$

素因数の和:13930

約数の個数: 48

約数和(自身を含む): 56060928

約数和(自身を除く): 34650308

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13903, 27806, 55612, 69515, 97321, 139030, 152933, 194642, 278060, 305866, 389284, 486605, 611732, 764665, 973210, 1070531, 1529330, 1946420, 2141062, 3058660, 4282124, 5352655, 10705310, 21410620]

約数ペア:

[(1, 21410620), (2, 10705310), (4, 5352655), (5, 4282124), (7, 3058660), (10, 2141062), (11, 1946420), (14, 1529330), (20, 1070531), (22, 973210), (28, 764665), (35, 611732), (44, 486605), (55, 389284), (70, 305866), (77, 278060), (110, 194642), (140, 152933), (154, 139030), (220, 97321), (308, 69515), (385, 55612), (770, 27806), (1540, 13903)]