19979970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1039}}^1$

素因数の和:1690

約数の個数: 32

約数和(自身を含む): 48072960

約数和(自身を除く): 28092990

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 641, 1039, 1282, 1923, 2078, 3117, 3205, 3846, 5195, 6234, 6410, 9615, 10390, 15585, 19230, 31170, 665999, 1331998, 1997997, 3329995, 3995994, 6659990, 9989985, 19979970]

約数ペア:

[(1, 19979970), (2, 9989985), (3, 6659990), (5, 3995994), (6, 3329995), (10, 1997997), (15, 1331998), (30, 665999), (641, 31170), (1039, 19230), (1282, 15585), (1923, 10390), (2078, 9615), (3117, 6410), (3205, 6234), (3846, 5195)]