18990640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{10321}}^1$

素因数の和:10357

約数の個数: 40

約数和(自身を含む): 46077408

約数和(自身を除く): 27086768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 10321, 20642, 41284, 51605, 82568, 103210, 165136, 206420, 237383, 412840, 474766, 825680, 949532, 1186915, 1899064, 2373830, 3798128, 4747660, 9495320, 18990640]

約数ペア:

[(1, 18990640), (2, 9495320), (4, 4747660), (5, 3798128), (8, 2373830), (10, 1899064), (16, 1186915), (20, 949532), (23, 825680), (40, 474766), (46, 412840), (80, 237383), (92, 206420), (115, 165136), (184, 103210), (230, 82568), (368, 51605), (460, 41284), (920, 20642), (1840, 10321)]