19691540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 46475520

約数和(自身を除く): 26783980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 103, 110, 121, 158, 206, 220, 242, 316, 395, 412, 484, 515, 605, 790, 869, 1030, 1133, 1210, 1580, 1738, 2060, 2266, 2420, 3476, 4345, 4532, 5665, 8137, 8690, 9559, 11330, 12463, 16274, 17380, 19118, 22660, 24926, 32548, 38236, 40685, 47795, 49852, 62315, 81370, 89507, 95590, 124630, 162740, 179014, 191180, 249260, 358028, 447535, 895070, 984577, 1790140, 1969154, 3938308, 4922885, 9845770, 19691540]

約数ペア:

[(1, 19691540), (2, 9845770), (4, 4922885), (5, 3938308), (10, 1969154), (11, 1790140), (20, 984577), (22, 895070), (44, 447535), (55, 358028), (79, 249260), (103, 191180), (110, 179014), (121, 162740), (158, 124630), (206, 95590), (220, 89507), (242, 81370), (316, 62315), (395, 49852), (412, 47795), (484, 40685), (515, 38236), (605, 32548), (790, 24926), (869, 22660), (1030, 19118), (1133, 17380), (1210, 16274), (1580, 12463), (1738, 11330), (2060, 9559), (2266, 8690), (2420, 8137), (3476, 5665), (4345, 4532)]