21325616

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1$

素因数の和:238

約数の個数: 80

約数和(自身を含む): 48684384

約数和(自身を除く): 27358768

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 37, 52, 68, 74, 104, 136, 148, 163, 208, 221, 272, 296, 326, 442, 481, 592, 629, 652, 884, 962, 1258, 1304, 1768, 1924, 2119, 2516, 2608, 2771, 3536, 3848, 4238, 5032, 5542, 6031, 7696, 8177, 8476, 10064, 11084, 12062, 16354, 16952, 22168, 24124, 32708, 33904, 36023, 44336, 48248, 65416, 72046, 78403, 96496, 102527, 130832, 144092, 156806, 205054, 288184, 313612, 410108, 576368, 627224, 820216, 1254448, 1332851, 1640432, 2665702, 5331404, 10662808, 21325616]

約数ペア:

[(1, 21325616), (2, 10662808), (4, 5331404), (8, 2665702), (13, 1640432), (16, 1332851), (17, 1254448), (26, 820216), (34, 627224), (37, 576368), (52, 410108), (68, 313612), (74, 288184), (104, 205054), (136, 156806), (148, 144092), (163, 130832), (208, 102527), (221, 96496), (272, 78403), (296, 72046), (326, 65416), (442, 48248), (481, 44336), (592, 36023), (629, 33904), (652, 32708), (884, 24124), (962, 22168), (1258, 16952), (1304, 16354), (1768, 12062), (1924, 11084), (2119, 10064), (2516, 8476), (2608, 8177), (2771, 7696), (3536, 6031), (3848, 5542), (4238, 5032)]