19830080

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2047

約数の個数: 56

約数和(自身を含む): 48768000

約数和(自身を除く): 28937920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 1999, 2480, 3998, 4960, 7996, 9920, 9995, 15992, 19990, 31984, 39980, 61969, 63968, 79960, 123938, 127936, 159920, 247876, 309845, 319840, 495752, 619690, 639680, 991504, 1239380, 1983008, 2478760, 3966016, 4957520, 9915040, 19830080]

約数ペア:

[(1, 19830080), (2, 9915040), (4, 4957520), (5, 3966016), (8, 2478760), (10, 1983008), (16, 1239380), (20, 991504), (31, 639680), (32, 619690), (40, 495752), (62, 319840), (64, 309845), (80, 247876), (124, 159920), (155, 127936), (160, 123938), (248, 79960), (310, 63968), (320, 61969), (496, 39980), (620, 31984), (992, 19990), (1240, 15992), (1984, 9995), (1999, 9920), (2480, 7996), (3998, 4960)]