21268780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{457}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 48474720

約数和(自身を除く): 27205940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 179, 260, 358, 457, 716, 895, 914, 1790, 1828, 2285, 2327, 3580, 4570, 4654, 5941, 9140, 9308, 11635, 11882, 23270, 23764, 29705, 46540, 59410, 81803, 118820, 163606, 327212, 409015, 818030, 1063439, 1636060, 2126878, 4253756, 5317195, 10634390, 21268780]

約数ペア:

[(1, 21268780), (2, 10634390), (4, 5317195), (5, 4253756), (10, 2126878), (13, 1636060), (20, 1063439), (26, 818030), (52, 409015), (65, 327212), (130, 163606), (179, 118820), (260, 81803), (358, 59410), (457, 46540), (716, 29705), (895, 23764), (914, 23270), (1790, 11882), (1828, 11635), (2285, 9308), (2327, 9140), (3580, 5941), (4570, 4654)]