21684460

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{109}}^1$

素因数の和:168

約数の個数: 96

約数和(自身を含む): 55440000

約数和(自身を除く): 33755540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 109, 116, 140, 145, 196, 203, 218, 245, 290, 343, 406, 436, 490, 545, 580, 686, 763, 812, 980, 1015, 1090, 1372, 1421, 1526, 1715, 2030, 2180, 2842, 3052, 3161, 3430, 3815, 4060, 5341, 5684, 6322, 6860, 7105, 7630, 9947, 10682, 12644, 14210, 15260, 15805, 19894, 21364, 22127, 26705, 28420, 31610, 37387, 39788, 44254, 49735, 53410, 63220, 74774, 88508, 99470, 106820, 110635, 149548, 154889, 186935, 198940, 221270, 309778, 373870, 442540, 619556, 747740, 774445, 1084223, 1548890, 2168446, 3097780, 4336892, 5421115, 10842230, 21684460]

約数ペア:

[(1, 21684460), (2, 10842230), (4, 5421115), (5, 4336892), (7, 3097780), (10, 2168446), (14, 1548890), (20, 1084223), (28, 774445), (29, 747740), (35, 619556), (49, 442540), (58, 373870), (70, 309778), (98, 221270), (109, 198940), (116, 186935), (140, 154889), (145, 149548), (196, 110635), (203, 106820), (218, 99470), (245, 88508), (290, 74774), (343, 63220), (406, 53410), (436, 49735), (490, 44254), (545, 39788), (580, 37387), (686, 31610), (763, 28420), (812, 26705), (980, 22127), (1015, 21364), (1090, 19894), (1372, 15805), (1421, 15260), (1526, 14210), (1715, 12644), (2030, 10682), (2180, 9947), (2842, 7630), (3052, 7105), (3161, 6860), (3430, 6322), (3815, 5684), (4060, 5341)]