21381569456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{647}}^1\times {\mathrm{158881}}^1$

素因数の和:159549

約数の個数: 40

約数和(自身を含む): 44682702624

約数和(自身を除く): 23301133168

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 647, 1294, 2588, 5176, 8411, 10352, 16822, 33644, 67288, 134576, 158881, 317762, 635524, 1271048, 2065453, 2542096, 4130906, 8261812, 16523624, 33047248, 102796007, 205592014, 411184028, 822368056, 1336348091, 1644736112, 2672696182, 5345392364, 10690784728, 21381569456]

約数ペア:

[(1, 21381569456), (2, 10690784728), (4, 5345392364), (8, 2672696182), (13, 1644736112), (16, 1336348091), (26, 822368056), (52, 411184028), (104, 205592014), (208, 102796007), (647, 33047248), (1294, 16523624), (2588, 8261812), (5176, 4130906), (8411, 2542096), (10352, 2065453), (16822, 1271048), (33644, 635524), (67288, 317762), (134576, 158881)]