21453380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{757}}^1$

素因数の和:888

約数の個数: 48

約数和(自身を含む): 49027440

約数和(自身を除く): 27574060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 757, 1090, 1417, 1514, 2180, 2834, 3028, 3785, 5668, 7085, 7570, 9841, 14170, 15140, 19682, 28340, 39364, 49205, 82513, 98410, 165026, 196820, 330052, 412565, 825130, 1072669, 1650260, 2145338, 4290676, 5363345, 10726690, 21453380]

約数ペア:

[(1, 21453380), (2, 10726690), (4, 5363345), (5, 4290676), (10, 2145338), (13, 1650260), (20, 1072669), (26, 825130), (52, 412565), (65, 330052), (109, 196820), (130, 165026), (218, 98410), (260, 82513), (436, 49205), (545, 39364), (757, 28340), (1090, 19682), (1417, 15140), (1514, 14170), (2180, 9841), (2834, 7570), (3028, 7085), (3785, 5668)]