21090550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:553

約数の個数: 48

約数和(自身を含む): 42934752

約数和(自身を除く): 21844202

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 457, 650, 710, 914, 923, 1775, 1846, 2285, 3550, 4570, 4615, 5941, 9230, 11425, 11882, 22850, 23075, 29705, 32447, 46150, 59410, 64894, 148525, 162235, 297050, 324470, 421811, 811175, 843622, 1622350, 2109055, 4218110, 10545275, 21090550]

約数ペア:

[(1, 21090550), (2, 10545275), (5, 4218110), (10, 2109055), (13, 1622350), (25, 843622), (26, 811175), (50, 421811), (65, 324470), (71, 297050), (130, 162235), (142, 148525), (325, 64894), (355, 59410), (457, 46150), (650, 32447), (710, 29705), (914, 23075), (923, 22850), (1775, 11882), (1846, 11425), (2285, 9230), (3550, 5941), (4570, 4615)]