21561645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 41771520

約数和(自身を除く): 20209875

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 73, 87, 97, 105, 145, 203, 219, 291, 365, 435, 485, 511, 609, 679, 1015, 1095, 1455, 1533, 2037, 2117, 2555, 2813, 3045, 3395, 6351, 7081, 7665, 8439, 10185, 10585, 14065, 14819, 19691, 21243, 31755, 35405, 42195, 44457, 49567, 59073, 74095, 98455, 106215, 148701, 205349, 222285, 247835, 295365, 616047, 743505, 1026745, 1437443, 3080235, 4312329, 7187215, 21561645]

約数ペア:

[(1, 21561645), (3, 7187215), (5, 4312329), (7, 3080235), (15, 1437443), (21, 1026745), (29, 743505), (35, 616047), (73, 295365), (87, 247835), (97, 222285), (105, 205349), (145, 148701), (203, 106215), (219, 98455), (291, 74095), (365, 59073), (435, 49567), (485, 44457), (511, 42195), (609, 35405), (679, 31755), (1015, 21243), (1095, 19691), (1455, 14819), (1533, 14065), (2037, 10585), (2117, 10185), (2555, 8439), (2813, 7665), (3045, 7081), (3395, 6351)]