21005948

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{541}}^1\times {\mathrm{571}}^1$

素因数の和:1133

約数の個数: 24

約数和(自身を含む): 39063024

約数和(自身を除く): 18057076

約数列:

[1, 2, 4, 17, 34, 68, 541, 571, 1082, 1142, 2164, 2284, 9197, 9707, 18394, 19414, 36788, 38828, 308911, 617822, 1235644, 5251487, 10502974, 21005948]

約数ペア:

[(1, 21005948), (2, 10502974), (4, 5251487), (17, 1235644), (34, 617822), (68, 308911), (541, 38828), (571, 36788), (1082, 19414), (1142, 18394), (2164, 9707), (2284, 9197)]