21815685

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{229}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 39826800

約数和(自身を除く): 18011115

約数列:

[1, 3, 5, 9, 15, 29, 45, 73, 87, 145, 219, 229, 261, 365, 435, 657, 687, 1095, 1145, 1305, 2061, 2117, 3285, 3435, 6351, 6641, 10305, 10585, 16717, 19053, 19923, 31755, 33205, 50151, 59769, 83585, 95265, 99615, 150453, 250755, 298845, 484793, 752265, 1454379, 2423965, 4363137, 7271895, 21815685]

約数ペア:

[(1, 21815685), (3, 7271895), (5, 4363137), (9, 2423965), (15, 1454379), (29, 752265), (45, 484793), (73, 298845), (87, 250755), (145, 150453), (219, 99615), (229, 95265), (261, 83585), (365, 59769), (435, 50151), (657, 33205), (687, 31755), (1095, 19923), (1145, 19053), (1305, 16717), (2061, 10585), (2117, 10305), (3285, 6641), (3435, 6351)]