21297328

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{317}}^1$

素因数の和:374

約数の個数: 80

約数和(自身を含む): 49684320

約数和(自身を除く): 28386992

約数列:

[1, 2, 4, 8, 13, 16, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 208, 221, 247, 272, 304, 317, 323, 442, 494, 634, 646, 884, 988, 1268, 1292, 1768, 1976, 2536, 2584, 3536, 3952, 4121, 4199, 5072, 5168, 5389, 6023, 8242, 8398, 10778, 12046, 16484, 16796, 21556, 24092, 32968, 33592, 43112, 48184, 65936, 67184, 70057, 78299, 86224, 96368, 102391, 140114, 156598, 204782, 280228, 313196, 409564, 560456, 626392, 819128, 1120912, 1252784, 1331083, 1638256, 2662166, 5324332, 10648664, 21297328]

約数ペア:

[(1, 21297328), (2, 10648664), (4, 5324332), (8, 2662166), (13, 1638256), (16, 1331083), (17, 1252784), (19, 1120912), (26, 819128), (34, 626392), (38, 560456), (52, 409564), (68, 313196), (76, 280228), (104, 204782), (136, 156598), (152, 140114), (208, 102391), (221, 96368), (247, 86224), (272, 78299), (304, 70057), (317, 67184), (323, 65936), (442, 48184), (494, 43112), (634, 33592), (646, 32968), (884, 24092), (988, 21556), (1268, 16796), (1292, 16484), (1768, 12046), (1976, 10778), (2536, 8398), (2584, 8242), (3536, 6023), (3952, 5389), (4121, 5168), (4199, 5072)]