21626199

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 40014000

約数和(自身を除く): 18387801

約数列:

[1, 3, 7, 9, 19, 21, 29, 49, 57, 63, 87, 89, 133, 147, 171, 203, 261, 267, 399, 441, 551, 609, 623, 801, 931, 1197, 1421, 1653, 1691, 1827, 1869, 2581, 2793, 3857, 4263, 4361, 4959, 5073, 5607, 7743, 8379, 11571, 11837, 12789, 13083, 15219, 18067, 23229, 26999, 34713, 35511, 39249, 49039, 54201, 80997, 82859, 106533, 126469, 147117, 162603, 242991, 248577, 343273, 379407, 441351, 745731, 1029819, 1138221, 2402911, 3089457, 7208733, 21626199]

約数ペア:

[(1, 21626199), (3, 7208733), (7, 3089457), (9, 2402911), (19, 1138221), (21, 1029819), (29, 745731), (49, 441351), (57, 379407), (63, 343273), (87, 248577), (89, 242991), (133, 162603), (147, 147117), (171, 126469), (203, 106533), (261, 82859), (267, 80997), (399, 54201), (441, 49039), (551, 39249), (609, 35511), (623, 34713), (801, 26999), (931, 23229), (1197, 18067), (1421, 15219), (1653, 13083), (1691, 12789), (1827, 11837), (1869, 11571), (2581, 8379), (2793, 7743), (3857, 5607), (4263, 5073), (4361, 4959)]