21458216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{229}}^1$

素因数の和:318

約数の個数: 64

約数和(自身を含む): 46947600

約数和(自身を除く): 25489384

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 53, 68, 104, 106, 136, 212, 221, 229, 424, 442, 458, 689, 884, 901, 916, 1378, 1768, 1802, 1832, 2756, 2977, 3604, 3893, 5512, 5954, 7208, 7786, 11713, 11908, 12137, 15572, 23426, 23816, 24274, 31144, 46852, 48548, 50609, 93704, 97096, 101218, 157781, 202436, 206329, 315562, 404872, 412658, 631124, 825316, 1262248, 1650632, 2682277, 5364554, 10729108, 21458216]

約数ペア:

[(1, 21458216), (2, 10729108), (4, 5364554), (8, 2682277), (13, 1650632), (17, 1262248), (26, 825316), (34, 631124), (52, 412658), (53, 404872), (68, 315562), (104, 206329), (106, 202436), (136, 157781), (212, 101218), (221, 97096), (229, 93704), (424, 50609), (442, 48548), (458, 46852), (689, 31144), (884, 24274), (901, 23816), (916, 23426), (1378, 15572), (1768, 12137), (1802, 11908), (1832, 11713), (2756, 7786), (2977, 7208), (3604, 5954), (3893, 5512)]