21254272

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 46652760

約数和(自身を除く): 25398488

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 53, 64, 104, 106, 128, 208, 212, 241, 416, 424, 482, 689, 832, 848, 964, 1378, 1664, 1696, 1928, 2756, 3133, 3392, 3856, 5512, 6266, 6784, 7712, 11024, 12532, 12773, 15424, 22048, 25064, 25546, 30848, 44096, 50128, 51092, 88192, 100256, 102184, 166049, 200512, 204368, 332098, 401024, 408736, 664196, 817472, 1328392, 1634944, 2656784, 5313568, 10627136, 21254272]

約数ペア:

[(1, 21254272), (2, 10627136), (4, 5313568), (8, 2656784), (13, 1634944), (16, 1328392), (26, 817472), (32, 664196), (52, 408736), (53, 401024), (64, 332098), (104, 204368), (106, 200512), (128, 166049), (208, 102184), (212, 100256), (241, 88192), (416, 51092), (424, 50128), (482, 44096), (689, 30848), (832, 25546), (848, 25064), (964, 22048), (1378, 15424), (1664, 12773), (1696, 12532), (1928, 11024), (2756, 7712), (3133, 6784), (3392, 6266), (3856, 5512)]