19519990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{431}}^1\times {\mathrm{647}}^1$

素因数の和:1092

約数の個数: 32

約数和(自身を含む): 40310784

約数和(自身を除く): 20790794

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 431, 647, 862, 1294, 2155, 3017, 3235, 4310, 4529, 6034, 6470, 9058, 15085, 22645, 30170, 45290, 278857, 557714, 1394285, 1951999, 2788570, 3903998, 9759995, 19519990]

約数ペア:

[(1, 19519990), (2, 9759995), (5, 3903998), (7, 2788570), (10, 1951999), (14, 1394285), (35, 557714), (70, 278857), (431, 45290), (647, 30170), (862, 22645), (1294, 15085), (2155, 9058), (3017, 6470), (3235, 6034), (4310, 4529)]