21242019980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{751}}^1\times {\mathrm{19919}}^1$

素因数の和:20750

約数の個数: 48

約数和(自身を含む): 45299036160

約数和(自身を除く): 24057016180

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 751, 1420, 1502, 3004, 3755, 7510, 15020, 19919, 39838, 53321, 79676, 99595, 106642, 199190, 213284, 266605, 398380, 533210, 1066420, 1414249, 2828498, 5656996, 7071245, 14142490, 14959169, 28284980, 29918338, 59836676, 74795845, 149591690, 299183380, 1062100999, 2124201998, 4248403996, 5310504995, 10621009990, 21242019980]

約数ペア:

[(1, 21242019980), (2, 10621009990), (4, 5310504995), (5, 4248403996), (10, 2124201998), (20, 1062100999), (71, 299183380), (142, 149591690), (284, 74795845), (355, 59836676), (710, 29918338), (751, 28284980), (1420, 14959169), (1502, 14142490), (3004, 7071245), (3755, 5656996), (7510, 2828498), (15020, 1414249), (19919, 1066420), (39838, 533210), (53321, 398380), (79676, 266605), (99595, 213284), (106642, 199190)]