18997720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3571}}^1$

素因数の和:3608

約数の個数: 64

約数和(自身を含む): 51436800

約数和(自身を除く): 32439080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 3571, 5320, 7142, 14284, 17855, 24997, 28568, 35710, 49994, 67849, 71420, 99988, 124985, 135698, 142840, 199976, 249970, 271396, 339245, 474943, 499940, 542792, 678490, 949886, 999880, 1356980, 1899772, 2374715, 2713960, 3799544, 4749430, 9498860, 18997720]

約数ペア:

[(1, 18997720), (2, 9498860), (4, 4749430), (5, 3799544), (7, 2713960), (8, 2374715), (10, 1899772), (14, 1356980), (19, 999880), (20, 949886), (28, 678490), (35, 542792), (38, 499940), (40, 474943), (56, 339245), (70, 271396), (76, 249970), (95, 199976), (133, 142840), (140, 135698), (152, 124985), (190, 99988), (266, 71420), (280, 67849), (380, 49994), (532, 35710), (665, 28568), (760, 24997), (1064, 17855), (1330, 14284), (2660, 7142), (3571, 5320)]