20538368

素因数分解:

$2^{10}\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:698

約数の個数: 44

約数和(自身を含む): 42446592

約数和(自身を除く): 21908224

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 647, 992, 1024, 1294, 1984, 2588, 3968, 5176, 7936, 10352, 15872, 20057, 20704, 31744, 40114, 41408, 80228, 82816, 160456, 165632, 320912, 331264, 641824, 662528, 1283648, 2567296, 5134592, 10269184, 20538368]

約数ペア:

[(1, 20538368), (2, 10269184), (4, 5134592), (8, 2567296), (16, 1283648), (31, 662528), (32, 641824), (62, 331264), (64, 320912), (124, 165632), (128, 160456), (248, 82816), (256, 80228), (496, 41408), (512, 40114), (647, 31744), (992, 20704), (1024, 20057), (1294, 15872), (1984, 10352), (2588, 7936), (3968, 5176)]