20581888

素因数分解:

$2^9\times {\mathrm{61}}^1\times {\mathrm{659}}^1$

素因数の和:738

約数の個数: 40

約数和(自身を含む): 41861160

約数和(自身を除く): 21279272

約数列:

[1, 2, 4, 8, 16, 32, 61, 64, 122, 128, 244, 256, 488, 512, 659, 976, 1318, 1952, 2636, 3904, 5272, 7808, 10544, 15616, 21088, 31232, 40199, 42176, 80398, 84352, 160796, 168704, 321592, 337408, 643184, 1286368, 2572736, 5145472, 10290944, 20581888]

約数ペア:

[(1, 20581888), (2, 10290944), (4, 5145472), (8, 2572736), (16, 1286368), (32, 643184), (61, 337408), (64, 321592), (122, 168704), (128, 160796), (244, 84352), (256, 80398), (488, 42176), (512, 40199), (659, 31232), (976, 21088), (1318, 15616), (1952, 10544), (2636, 7808), (3904, 5272)]