19945359

素因数分解:

$3^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1213}}^1$

素因数の和:1261

約数の個数: 40

約数和(自身を含む): 35254560

約数和(自身を除く): 15309201

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 261, 567, 609, 783, 1213, 1827, 2349, 3639, 5481, 8491, 10917, 16443, 25473, 32751, 35177, 76419, 98253, 105531, 229257, 246239, 316593, 687771, 738717, 949779, 2216151, 2849337, 6648453, 19945359]

約数ペア:

[(1, 19945359), (3, 6648453), (7, 2849337), (9, 2216151), (21, 949779), (27, 738717), (29, 687771), (63, 316593), (81, 246239), (87, 229257), (189, 105531), (203, 98253), (261, 76419), (567, 35177), (609, 32751), (783, 25473), (1213, 16443), (1827, 10917), (2349, 8491), (3639, 5481)]