21492560

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:240

約数の個数: 80

約数和(自身を含む): 52670736

約数和(自身を除く): 31178176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 53, 74, 80, 106, 137, 148, 185, 212, 265, 274, 296, 370, 424, 530, 548, 592, 685, 740, 848, 1060, 1096, 1370, 1480, 1961, 2120, 2192, 2740, 2960, 3922, 4240, 5069, 5480, 7261, 7844, 9805, 10138, 10960, 14522, 15688, 19610, 20276, 25345, 29044, 31376, 36305, 39220, 40552, 50690, 58088, 72610, 78440, 81104, 101380, 116176, 145220, 156880, 202760, 268657, 290440, 405520, 537314, 580880, 1074628, 1343285, 2149256, 2686570, 4298512, 5373140, 10746280, 21492560]

約数ペア:

[(1, 21492560), (2, 10746280), (4, 5373140), (5, 4298512), (8, 2686570), (10, 2149256), (16, 1343285), (20, 1074628), (37, 580880), (40, 537314), (53, 405520), (74, 290440), (80, 268657), (106, 202760), (137, 156880), (148, 145220), (185, 116176), (212, 101380), (265, 81104), (274, 78440), (296, 72610), (370, 58088), (424, 50690), (530, 40552), (548, 39220), (592, 36305), (685, 31376), (740, 29044), (848, 25345), (1060, 20276), (1096, 19610), (1370, 15688), (1480, 14522), (1961, 10960), (2120, 10138), (2192, 9805), (2740, 7844), (2960, 7261), (3922, 5480), (4240, 5069)]