64721680

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{5153}}^1$

素因数の和:5323

約数の個数: 40

約数和(自身を含む): 151465752

約数和(自身を除く): 86744072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 2512, 3140, 5153, 6280, 10306, 12560, 20612, 25765, 41224, 51530, 82448, 103060, 206120, 412240, 809021, 1618042, 3236084, 4045105, 6472168, 8090210, 12944336, 16180420, 32360840, 64721680]

約数ペア:

[(1, 64721680), (2, 32360840), (4, 16180420), (5, 12944336), (8, 8090210), (10, 6472168), (16, 4045105), (20, 3236084), (40, 1618042), (80, 809021), (157, 412240), (314, 206120), (628, 103060), (785, 82448), (1256, 51530), (1570, 41224), (2512, 25765), (3140, 20612), (5153, 12560), (6280, 10306)]