19781538

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 27738462

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 42, 58, 87, 109, 149, 174, 203, 218, 298, 327, 406, 447, 609, 654, 763, 894, 1043, 1218, 1526, 2086, 2289, 3129, 3161, 4321, 4578, 6258, 6322, 8642, 9483, 12963, 16241, 18966, 22127, 25926, 30247, 32482, 44254, 48723, 60494, 66381, 90741, 97446, 113687, 132762, 181482, 227374, 341061, 470989, 682122, 941978, 1412967, 2825934, 3296923, 6593846, 9890769, 19781538]

約数ペア:

[(1, 19781538), (2, 9890769), (3, 6593846), (6, 3296923), (7, 2825934), (14, 1412967), (21, 941978), (29, 682122), (42, 470989), (58, 341061), (87, 227374), (109, 181482), (149, 132762), (174, 113687), (203, 97446), (218, 90741), (298, 66381), (327, 60494), (406, 48723), (447, 44254), (609, 32482), (654, 30247), (763, 25926), (894, 22127), (1043, 18966), (1218, 16241), (1526, 12963), (2086, 9483), (2289, 8642), (3129, 6322), (3161, 6258), (4321, 4578)]