205745820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{489871}}^1$

素因数の和:489890

約数の個数: 48

約数和(自身を含む): 658387968

約数和(自身を除く): 452642148

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 489871, 979742, 1469613, 1959484, 2449355, 2939226, 3429097, 4898710, 5878452, 6858194, 7348065, 9797420, 10287291, 13716388, 14696130, 17145485, 20574582, 29392260, 34290970, 41149164, 51436455, 68581940, 102872910, 205745820]

約数ペア:

[(1, 205745820), (2, 102872910), (3, 68581940), (4, 51436455), (5, 41149164), (6, 34290970), (7, 29392260), (10, 20574582), (12, 17145485), (14, 14696130), (15, 13716388), (20, 10287291), (21, 9797420), (28, 7348065), (30, 6858194), (35, 5878452), (42, 4898710), (60, 3429097), (70, 2939226), (84, 2449355), (105, 1959484), (140, 1469613), (210, 979742), (420, 489871)]