128737040

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{4013}}^1$

素因数の和:4427

約数の個数: 40

約数和(自身を含む): 300134808

約数和(自身を除く): 171397768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 802, 1604, 2005, 3208, 4010, 4013, 6416, 8020, 8026, 16040, 16052, 20065, 32080, 32104, 40130, 64208, 80260, 160520, 321040, 1609213, 3218426, 6436852, 8046065, 12873704, 16092130, 25747408, 32184260, 64368520, 128737040]

約数ペア:

[(1, 128737040), (2, 64368520), (4, 32184260), (5, 25747408), (8, 16092130), (10, 12873704), (16, 8046065), (20, 6436852), (40, 3218426), (80, 1609213), (401, 321040), (802, 160520), (1604, 80260), (2005, 64208), (3208, 40130), (4010, 32104), (4013, 32080), (6416, 20065), (8020, 16052), (8026, 16040)]