18880072

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{557}}^1$

素因数の和:805

約数の個数: 32

約数和(自身を含む): 37497600

約数和(自身を除く): 18617528

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 223, 446, 557, 892, 1114, 1784, 2228, 4237, 4456, 8474, 10583, 16948, 21166, 33896, 42332, 84664, 124211, 248422, 496844, 993688, 2360009, 4720018, 9440036, 18880072]

約数ペア:

[(1, 18880072), (2, 9440036), (4, 4720018), (8, 2360009), (19, 993688), (38, 496844), (76, 248422), (152, 124211), (223, 84664), (446, 42332), (557, 33896), (892, 21166), (1114, 16948), (1784, 10583), (2228, 8474), (4237, 4456)]