21719800

素因数分解:

$2^3\times 5^2\times {\mathrm{131}}^1\times {\mathrm{829}}^1$

素因数の和:976

約数の個数: 48

約数和(自身を含む): 50945400

約数和(自身を除く): 29225600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 131, 200, 262, 524, 655, 829, 1048, 1310, 1658, 2620, 3275, 3316, 4145, 5240, 6550, 6632, 8290, 13100, 16580, 20725, 26200, 33160, 41450, 82900, 108599, 165800, 217198, 434396, 542995, 868792, 1085990, 2171980, 2714975, 4343960, 5429950, 10859900, 21719800]

約数ペア:

[(1, 21719800), (2, 10859900), (4, 5429950), (5, 4343960), (8, 2714975), (10, 2171980), (20, 1085990), (25, 868792), (40, 542995), (50, 434396), (100, 217198), (131, 165800), (200, 108599), (262, 82900), (524, 41450), (655, 33160), (829, 26200), (1048, 20725), (1310, 16580), (1658, 13100), (2620, 8290), (3275, 6632), (3316, 6550), (4145, 5240)]