21000688285

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{1663}}^1$

素因数の和:1870

約数の個数: 64

約数和(自身を含む): 28466380800

約数和(自身を除く): 7465692515

約数列:

[1, 5, 17, 29, 47, 85, 109, 145, 235, 493, 545, 799, 1363, 1663, 1853, 2465, 3161, 3995, 5123, 6815, 8315, 9265, 15805, 23171, 25615, 28271, 48227, 53737, 78161, 87091, 115855, 141355, 148567, 181267, 241135, 268685, 390805, 435455, 742835, 819859, 906335, 1328737, 2266669, 2525639, 3081539, 4099295, 5256743, 6643685, 8519549, 11333345, 12628195, 15407695, 26283715, 38533373, 42597745, 89364631, 144832333, 192666865, 247066921, 446823155, 724161665, 1235334605, 4200137657, 21000688285]

約数ペア:

[(1, 21000688285), (5, 4200137657), (17, 1235334605), (29, 724161665), (47, 446823155), (85, 247066921), (109, 192666865), (145, 144832333), (235, 89364631), (493, 42597745), (545, 38533373), (799, 26283715), (1363, 15407695), (1663, 12628195), (1853, 11333345), (2465, 8519549), (3161, 6643685), (3995, 5256743), (5123, 4099295), (6815, 3081539), (8315, 2525639), (9265, 2266669), (15805, 1328737), (23171, 906335), (25615, 819859), (28271, 742835), (48227, 435455), (53737, 390805), (78161, 268685), (87091, 241135), (115855, 181267), (141355, 148567)]