19750120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2042

約数の個数: 64

約数和(自身を含む): 50400000

約数和(自身を除く): 30649880

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 1999, 2470, 3998, 4940, 7996, 9880, 9995, 15992, 19990, 25987, 37981, 39980, 51974, 75962, 79960, 103948, 129935, 151924, 189905, 207896, 259870, 303848, 379810, 493753, 519740, 759620, 987506, 1039480, 1519240, 1975012, 2468765, 3950024, 4937530, 9875060, 19750120]

約数ペア:

[(1, 19750120), (2, 9875060), (4, 4937530), (5, 3950024), (8, 2468765), (10, 1975012), (13, 1519240), (19, 1039480), (20, 987506), (26, 759620), (38, 519740), (40, 493753), (52, 379810), (65, 303848), (76, 259870), (95, 207896), (104, 189905), (130, 151924), (152, 129935), (190, 103948), (247, 79960), (260, 75962), (380, 51974), (494, 39980), (520, 37981), (760, 25987), (988, 19990), (1235, 15992), (1976, 9995), (1999, 9880), (2470, 7996), (3998, 4940)]