18750620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{1999}}^1$

素因数の和:2082

約数の個数: 48

約数和(自身を含む): 45696000

約数和(自身を除く): 26945380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 1999, 2345, 3998, 4690, 7996, 9380, 9995, 13993, 19990, 27986, 39980, 55972, 69965, 133933, 139930, 267866, 279860, 535732, 669665, 937531, 1339330, 1875062, 2678660, 3750124, 4687655, 9375310, 18750620]

約数ペア:

[(1, 18750620), (2, 9375310), (4, 4687655), (5, 3750124), (7, 2678660), (10, 1875062), (14, 1339330), (20, 937531), (28, 669665), (35, 535732), (67, 279860), (70, 267866), (134, 139930), (140, 133933), (268, 69965), (335, 55972), (469, 39980), (670, 27986), (938, 19990), (1340, 13993), (1876, 9995), (1999, 9380), (2345, 7996), (3998, 4690)]