18991336

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1373}}^1$

素因数の和:1418

約数の個数: 64

約数和(自身を含む): 46166400

約数和(自身を除く): 27175064

約数列:

[1, 2, 4, 7, 8, 13, 14, 19, 26, 28, 38, 52, 56, 76, 91, 104, 133, 152, 182, 247, 266, 364, 494, 532, 728, 988, 1064, 1373, 1729, 1976, 2746, 3458, 5492, 6916, 9611, 10984, 13832, 17849, 19222, 26087, 35698, 38444, 52174, 71396, 76888, 104348, 124943, 142792, 182609, 208696, 249886, 339131, 365218, 499772, 678262, 730436, 999544, 1356524, 1460872, 2373917, 2713048, 4747834, 9495668, 18991336]

約数ペア:

[(1, 18991336), (2, 9495668), (4, 4747834), (7, 2713048), (8, 2373917), (13, 1460872), (14, 1356524), (19, 999544), (26, 730436), (28, 678262), (38, 499772), (52, 365218), (56, 339131), (76, 249886), (91, 208696), (104, 182609), (133, 142792), (152, 124943), (182, 104348), (247, 76888), (266, 71396), (364, 52174), (494, 38444), (532, 35698), (728, 26087), (988, 19222), (1064, 17849), (1373, 13832), (1729, 10984), (1976, 9611), (2746, 6916), (3458, 5492)]