19706990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:201

約数の個数: 48

約数和(自身を含む): 38514528

約数和(自身を除く): 18807538

約数列:

[1, 2, 5, 10, 19, 38, 53, 95, 103, 106, 190, 206, 265, 361, 515, 530, 722, 1007, 1030, 1805, 1957, 2014, 3610, 3914, 5035, 5459, 9785, 10070, 10918, 19133, 19570, 27295, 37183, 38266, 54590, 74366, 95665, 103721, 185915, 191330, 207442, 371830, 518605, 1037210, 1970699, 3941398, 9853495, 19706990]

約数ペア:

[(1, 19706990), (2, 9853495), (5, 3941398), (10, 1970699), (19, 1037210), (38, 518605), (53, 371830), (95, 207442), (103, 191330), (106, 185915), (190, 103721), (206, 95665), (265, 74366), (361, 54590), (515, 38266), (530, 37183), (722, 27295), (1007, 19570), (1030, 19133), (1805, 10918), (1957, 10070), (2014, 9785), (3610, 5459), (3914, 5035)]