2171980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{829}}^1$

素因数の和:969

約数の個数: 24

約数和(自身を含む): 4601520

約数和(自身を除く): 2429540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 829, 1310, 1658, 2620, 3316, 4145, 8290, 16580, 108599, 217198, 434396, 542995, 1085990, 2171980]

約数ペア:

[(1, 2171980), (2, 1085990), (4, 542995), (5, 434396), (10, 217198), (20, 108599), (131, 16580), (262, 8290), (524, 4145), (655, 3316), (829, 2620), (1310, 1658)]