18636820

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 21723500

約数列:

[1, 2, 4, 5, 10, 20, 83, 103, 109, 166, 206, 218, 332, 412, 415, 436, 515, 545, 830, 1030, 1090, 1660, 2060, 2180, 8549, 9047, 11227, 17098, 18094, 22454, 34196, 36188, 42745, 44908, 45235, 56135, 85490, 90470, 112270, 170980, 180940, 224540, 931841, 1863682, 3727364, 4659205, 9318410, 18636820]

約数ペア:

[(1, 18636820), (2, 9318410), (4, 4659205), (5, 3727364), (10, 1863682), (20, 931841), (83, 224540), (103, 180940), (109, 170980), (166, 112270), (206, 90470), (218, 85490), (332, 56135), (412, 45235), (415, 44908), (436, 42745), (515, 36188), (545, 34196), (830, 22454), (1030, 18094), (1090, 17098), (1660, 11227), (2060, 9047), (2180, 8549)]