21689150

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2049

約数の個数: 48

約数和(自身を含む): 47616000

約数和(自身を除く): 25926850

約数列:

[1, 2, 5, 7, 10, 14, 25, 31, 35, 50, 62, 70, 155, 175, 217, 310, 350, 434, 775, 1085, 1550, 1999, 2170, 3998, 5425, 9995, 10850, 13993, 19990, 27986, 49975, 61969, 69965, 99950, 123938, 139930, 309845, 349825, 433783, 619690, 699650, 867566, 1549225, 2168915, 3098450, 4337830, 10844575, 21689150]

約数ペア:

[(1, 21689150), (2, 10844575), (5, 4337830), (7, 3098450), (10, 2168915), (14, 1549225), (25, 867566), (31, 699650), (35, 619690), (50, 433783), (62, 349825), (70, 309845), (155, 139930), (175, 123938), (217, 99950), (310, 69965), (350, 61969), (434, 49975), (775, 27986), (1085, 19990), (1550, 13993), (1999, 10850), (2170, 9995), (3998, 5425)]