64781840

素因数分解:

$2^4\times 5^1\times {\mathrm{613}}^1\times {\mathrm{1321}}^1$

素因数の和:1947

約数の個数: 40

約数和(自身を含む): 150977688

約数和(自身を除く): 86195848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 613, 1226, 1321, 2452, 2642, 3065, 4904, 5284, 6130, 6605, 9808, 10568, 12260, 13210, 21136, 24520, 26420, 49040, 52840, 105680, 809773, 1619546, 3239092, 4048865, 6478184, 8097730, 12956368, 16195460, 32390920, 64781840]

約数ペア:

[(1, 64781840), (2, 32390920), (4, 16195460), (5, 12956368), (8, 8097730), (10, 6478184), (16, 4048865), (20, 3239092), (40, 1619546), (80, 809773), (613, 105680), (1226, 52840), (1321, 49040), (2452, 26420), (2642, 24520), (3065, 21136), (4904, 13210), (5284, 12260), (6130, 10568), (6605, 9808)]