81470240

素因数分解:

$2^5\times 5^1\times {\mathrm{647}}^1\times {\mathrm{787}}^1$

素因数の和:1449

約数の個数: 48

約数和(自身を含む): 193015872

約数和(自身を除く): 111545632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 647, 787, 1294, 1574, 2588, 3148, 3235, 3935, 5176, 6296, 6470, 7870, 10352, 12592, 12940, 15740, 20704, 25184, 25880, 31480, 51760, 62960, 103520, 125920, 509189, 1018378, 2036756, 2545945, 4073512, 5091890, 8147024, 10183780, 16294048, 20367560, 40735120, 81470240]

約数ペア:

[(1, 81470240), (2, 40735120), (4, 20367560), (5, 16294048), (8, 10183780), (10, 8147024), (16, 5091890), (20, 4073512), (32, 2545945), (40, 2036756), (80, 1018378), (160, 509189), (647, 125920), (787, 103520), (1294, 62960), (1574, 51760), (2588, 31480), (3148, 25880), (3235, 25184), (3935, 20704), (5176, 15740), (6296, 12940), (6470, 12592), (7870, 10352)]