21157990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 24461210

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 59, 70, 94, 109, 118, 218, 235, 295, 329, 413, 470, 545, 590, 658, 763, 826, 1090, 1526, 1645, 2065, 2773, 3290, 3815, 4130, 5123, 5546, 6431, 7630, 10246, 12862, 13865, 19411, 25615, 27730, 32155, 35861, 38822, 45017, 51230, 64310, 71722, 90034, 97055, 179305, 194110, 225085, 302257, 358610, 450170, 604514, 1511285, 2115799, 3022570, 4231598, 10578995, 21157990]

約数ペア:

[(1, 21157990), (2, 10578995), (5, 4231598), (7, 3022570), (10, 2115799), (14, 1511285), (35, 604514), (47, 450170), (59, 358610), (70, 302257), (94, 225085), (109, 194110), (118, 179305), (218, 97055), (235, 90034), (295, 71722), (329, 64310), (413, 51230), (470, 45017), (545, 38822), (590, 35861), (658, 32155), (763, 27730), (826, 25615), (1090, 19411), (1526, 13865), (1645, 12862), (2065, 10246), (2773, 7630), (3290, 6431), (3815, 5546), (4130, 5123)]