18123880

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 24333080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 83, 103, 106, 166, 206, 212, 265, 332, 412, 415, 424, 515, 530, 664, 824, 830, 1030, 1060, 1660, 2060, 2120, 3320, 4120, 4399, 5459, 8549, 8798, 10918, 17098, 17596, 21836, 21995, 27295, 34196, 35192, 42745, 43672, 43990, 54590, 68392, 85490, 87980, 109180, 170980, 175960, 218360, 341960, 453097, 906194, 1812388, 2265485, 3624776, 4530970, 9061940, 18123880]

約数ペア:

[(1, 18123880), (2, 9061940), (4, 4530970), (5, 3624776), (8, 2265485), (10, 1812388), (20, 906194), (40, 453097), (53, 341960), (83, 218360), (103, 175960), (106, 170980), (166, 109180), (206, 87980), (212, 85490), (265, 68392), (332, 54590), (412, 43990), (415, 43672), (424, 42745), (515, 35192), (530, 34196), (664, 27295), (824, 21995), (830, 21836), (1030, 17596), (1060, 17098), (1660, 10918), (2060, 8798), (2120, 8549), (3320, 5459), (4120, 4399)]