20000128

素因数分解:

$2^7\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:195

約数の個数: 64

約数和(自身を含む): 42325920

約数和(自身を除く): 22325792

約数列:

[1, 2, 4, 8, 16, 32, 37, 41, 64, 74, 82, 103, 128, 148, 164, 206, 296, 328, 412, 592, 656, 824, 1184, 1312, 1517, 1648, 2368, 2624, 3034, 3296, 3811, 4223, 4736, 5248, 6068, 6592, 7622, 8446, 12136, 13184, 15244, 16892, 24272, 30488, 33784, 48544, 60976, 67568, 97088, 121952, 135136, 156251, 194176, 243904, 270272, 312502, 487808, 540544, 625004, 1250008, 2500016, 5000032, 10000064, 20000128]

約数ペア:

[(1, 20000128), (2, 10000064), (4, 5000032), (8, 2500016), (16, 1250008), (32, 625004), (37, 540544), (41, 487808), (64, 312502), (74, 270272), (82, 243904), (103, 194176), (128, 156251), (148, 135136), (164, 121952), (206, 97088), (296, 67568), (328, 60976), (412, 48544), (592, 33784), (656, 30488), (824, 24272), (1184, 16892), (1312, 15244), (1517, 13184), (1648, 12136), (2368, 8446), (2624, 7622), (3034, 6592), (3296, 6068), (3811, 5248), (4223, 4736)]