21880360

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1399}}^1$

素因数の和:1450

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 32551640

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1399, 1564, 1955, 2798, 3128, 3910, 5596, 6995, 7820, 11192, 13990, 15640, 23783, 27980, 32177, 47566, 55960, 64354, 95132, 118915, 128708, 160885, 190264, 237830, 257416, 321770, 475660, 547009, 643540, 951320, 1094018, 1287080, 2188036, 2735045, 4376072, 5470090, 10940180, 21880360]

約数ペア:

[(1, 21880360), (2, 10940180), (4, 5470090), (5, 4376072), (8, 2735045), (10, 2188036), (17, 1287080), (20, 1094018), (23, 951320), (34, 643540), (40, 547009), (46, 475660), (68, 321770), (85, 257416), (92, 237830), (115, 190264), (136, 160885), (170, 128708), (184, 118915), (230, 95132), (340, 64354), (391, 55960), (460, 47566), (680, 32177), (782, 27980), (920, 23783), (1399, 15640), (1564, 13990), (1955, 11192), (2798, 7820), (3128, 6995), (3910, 5596)]