19972855

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{577}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 29297664

約数和(自身を除く): 9324809

約数列:

[1, 5, 7, 23, 35, 43, 115, 161, 215, 301, 577, 805, 989, 1505, 2885, 4039, 4945, 6923, 13271, 20195, 24811, 34615, 66355, 92897, 124055, 173677, 464485, 570653, 868385, 2853265, 3994571, 19972855]

約数ペア:

[(1, 19972855), (5, 3994571), (7, 2853265), (23, 868385), (35, 570653), (43, 464485), (115, 173677), (161, 124055), (215, 92897), (301, 66355), (577, 34615), (805, 24811), (989, 20195), (1505, 13271), (2885, 6923), (4039, 4945)]