21000427900

素因数分解:

$2^2\times 5^2\times {\mathrm{127}}^1\times {\mathrm{379}}^1\times {\mathrm{4363}}^1$

素因数の和:4883

約数の個数: 72

約数和(自身を含む): 46061496320

約数和(自身を除く): 25061068420

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 127, 254, 379, 508, 635, 758, 1270, 1516, 1895, 2540, 3175, 3790, 4363, 6350, 7580, 8726, 9475, 12700, 17452, 18950, 21815, 37900, 43630, 48133, 87260, 96266, 109075, 192532, 218150, 240665, 436300, 481330, 554101, 962660, 1108202, 1203325, 1653577, 2216404, 2406650, 2770505, 3307154, 4813300, 5541010, 6614308, 8267885, 11082020, 13852525, 16535770, 27705050, 33071540, 41339425, 55410100, 82678850, 165357700, 210004279, 420008558, 840017116, 1050021395, 2100042790, 4200085580, 5250106975, 10500213950, 21000427900]

約数ペア:

[(1, 21000427900), (2, 10500213950), (4, 5250106975), (5, 4200085580), (10, 2100042790), (20, 1050021395), (25, 840017116), (50, 420008558), (100, 210004279), (127, 165357700), (254, 82678850), (379, 55410100), (508, 41339425), (635, 33071540), (758, 27705050), (1270, 16535770), (1516, 13852525), (1895, 11082020), (2540, 8267885), (3175, 6614308), (3790, 5541010), (4363, 4813300), (6350, 3307154), (7580, 2770505), (8726, 2406650), (9475, 2216404), (12700, 1653577), (17452, 1203325), (18950, 1108202), (21815, 962660), (37900, 554101), (43630, 481330), (48133, 436300), (87260, 240665), (96266, 218150), (109075, 192532)]