21981700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{457}}^1$

素因数の和:521

約数の個数: 72

約数和(自身を含む): 52873352

約数和(自身を除く): 30891652

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 37, 50, 52, 65, 74, 100, 130, 148, 185, 260, 325, 370, 457, 481, 650, 740, 914, 925, 962, 1300, 1828, 1850, 1924, 2285, 2405, 3700, 4570, 4810, 5941, 9140, 9620, 11425, 11882, 12025, 16909, 22850, 23764, 24050, 29705, 33818, 45700, 48100, 59410, 67636, 84545, 118820, 148525, 169090, 219817, 297050, 338180, 422725, 439634, 594100, 845450, 879268, 1099085, 1690900, 2198170, 4396340, 5495425, 10990850, 21981700]

約数ペア:

[(1, 21981700), (2, 10990850), (4, 5495425), (5, 4396340), (10, 2198170), (13, 1690900), (20, 1099085), (25, 879268), (26, 845450), (37, 594100), (50, 439634), (52, 422725), (65, 338180), (74, 297050), (100, 219817), (130, 169090), (148, 148525), (185, 118820), (260, 84545), (325, 67636), (370, 59410), (457, 48100), (481, 45700), (650, 33818), (740, 29705), (914, 24050), (925, 23764), (962, 22850), (1300, 16909), (1828, 12025), (1850, 11882), (1924, 11425), (2285, 9620), (2405, 9140), (3700, 5941), (4570, 4810)]