21393424

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{631}}^1$

素因数の和:815

約数の個数: 40

約数和(自身を含む): 44983232

約数和(自身を除く): 23589808

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 163, 208, 326, 631, 652, 1262, 1304, 2119, 2524, 2608, 4238, 5048, 8203, 8476, 10096, 16406, 16952, 32812, 33904, 65624, 102853, 131248, 205706, 411412, 822824, 1337089, 1645648, 2674178, 5348356, 10696712, 21393424]

約数ペア:

[(1, 21393424), (2, 10696712), (4, 5348356), (8, 2674178), (13, 1645648), (16, 1337089), (26, 822824), (52, 411412), (104, 205706), (163, 131248), (208, 102853), (326, 65624), (631, 33904), (652, 32812), (1262, 16952), (1304, 16406), (2119, 10096), (2524, 8476), (2608, 8203), (4238, 5048)]