19660280

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1601}}^1$

素因数の和:1919

約数の個数: 32

約数和(自身を含む): 44407440

約数和(自身を除く): 24747160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1601, 2456, 3070, 3202, 6140, 6404, 8005, 12280, 12808, 16010, 32020, 64040, 491507, 983014, 1966028, 2457535, 3932056, 4915070, 9830140, 19660280]

約数ペア:

[(1, 19660280), (2, 9830140), (4, 4915070), (5, 3932056), (8, 2457535), (10, 1966028), (20, 983014), (40, 491507), (307, 64040), (614, 32020), (1228, 16010), (1535, 12808), (1601, 12280), (2456, 8005), (3070, 6404), (3202, 6140)]