21851720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49663}}^1$

素因数の和:49685

約数の個数: 32

約数和(自身を含む): 53637120

約数和(自身を除く): 31785400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49663, 99326, 198652, 248315, 397304, 496630, 546293, 993260, 1092586, 1986520, 2185172, 2731465, 4370344, 5462930, 10925860, 21851720]

約数ペア:

[(1, 21851720), (2, 10925860), (4, 5462930), (5, 4370344), (8, 2731465), (10, 2185172), (11, 1986520), (20, 1092586), (22, 993260), (40, 546293), (44, 496630), (55, 397304), (88, 248315), (110, 198652), (220, 99326), (440, 49663)]