19972990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{3391}}^1$

素因数の和:3448

約数の個数: 32

約数和(自身を含む): 39075840

約数和(自身を除く): 19102850

約数列:

[1, 2, 5, 10, 19, 31, 38, 62, 95, 155, 190, 310, 589, 1178, 2945, 3391, 5890, 6782, 16955, 33910, 64429, 105121, 128858, 210242, 322145, 525605, 644290, 1051210, 1997299, 3994598, 9986495, 19972990]

約数ペア:

[(1, 19972990), (2, 9986495), (5, 3994598), (10, 1997299), (19, 1051210), (31, 644290), (38, 525605), (62, 322145), (95, 210242), (155, 128858), (190, 105121), (310, 64429), (589, 33910), (1178, 16955), (2945, 6782), (3391, 5890)]