19687885

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 28979712

約数和(自身を除く): 9291827

約数列:

[1, 5, 7, 23, 35, 37, 115, 161, 185, 259, 661, 805, 851, 1295, 3305, 4255, 4627, 5957, 15203, 23135, 24457, 29785, 76015, 106421, 122285, 171199, 532105, 562511, 855995, 2812555, 3937577, 19687885]

約数ペア:

[(1, 19687885), (5, 3937577), (7, 2812555), (23, 855995), (35, 562511), (37, 532105), (115, 171199), (161, 122285), (185, 106421), (259, 76015), (661, 29785), (805, 24457), (851, 23135), (1295, 15203), (3305, 5957), (4255, 4627)]