19980970

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1021}}^1$

素因数の和:1150

約数の個数: 32

約数和(自身を含む): 38263680

約数和(自身を除く): 18282710

約数列:

[1, 2, 5, 10, 19, 38, 95, 103, 190, 206, 515, 1021, 1030, 1957, 2042, 3914, 5105, 9785, 10210, 19399, 19570, 38798, 96995, 105163, 193990, 210326, 525815, 1051630, 1998097, 3996194, 9990485, 19980970]

約数ペア:

[(1, 19980970), (2, 9990485), (5, 3996194), (10, 1998097), (19, 1051630), (38, 525815), (95, 210326), (103, 193990), (190, 105163), (206, 96995), (515, 38798), (1021, 19570), (1030, 19399), (1957, 10210), (2042, 9785), (3914, 5105)]