20997280

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6907}}^1$

素因数の和:6941

約数の個数: 48

約数和(自身を含む): 52224480

約数和(自身を除く): 31227200

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6907, 13814, 27628, 34535, 55256, 69070, 110512, 131233, 138140, 221024, 262466, 276280, 524932, 552560, 656165, 1049864, 1105120, 1312330, 2099728, 2624660, 4199456, 5249320, 10498640, 20997280]

約数ペア:

[(1, 20997280), (2, 10498640), (4, 5249320), (5, 4199456), (8, 2624660), (10, 2099728), (16, 1312330), (19, 1105120), (20, 1049864), (32, 656165), (38, 552560), (40, 524932), (76, 276280), (80, 262466), (95, 221024), (152, 138140), (160, 131233), (190, 110512), (304, 69070), (380, 55256), (608, 34535), (760, 27628), (1520, 13814), (3040, 6907)]