17991860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{419}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 40219200

約数和(自身を除く): 22227340

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 113, 190, 226, 380, 419, 452, 565, 838, 1130, 1676, 2095, 2147, 2260, 4190, 4294, 7961, 8380, 8588, 10735, 15922, 21470, 31844, 39805, 42940, 47347, 79610, 94694, 159220, 189388, 236735, 473470, 899593, 946940, 1799186, 3598372, 4497965, 8995930, 17991860]

約数ペア:

[(1, 17991860), (2, 8995930), (4, 4497965), (5, 3598372), (10, 1799186), (19, 946940), (20, 899593), (38, 473470), (76, 236735), (95, 189388), (113, 159220), (190, 94694), (226, 79610), (380, 47347), (419, 42940), (452, 39805), (565, 31844), (838, 21470), (1130, 15922), (1676, 10735), (2095, 8588), (2147, 8380), (2260, 7961), (4190, 4294)]