20818720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10009}}^1$

素因数の和:10037

約数の個数: 48

約数和(自身を含む): 52972920

約数和(自身を除く): 32154200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10009, 20018, 40036, 50045, 80072, 100090, 130117, 160144, 200180, 260234, 320288, 400360, 520468, 650585, 800720, 1040936, 1301170, 1601440, 2081872, 2602340, 4163744, 5204680, 10409360, 20818720]

約数ペア:

[(1, 20818720), (2, 10409360), (4, 5204680), (5, 4163744), (8, 2602340), (10, 2081872), (13, 1601440), (16, 1301170), (20, 1040936), (26, 800720), (32, 650585), (40, 520468), (52, 400360), (65, 320288), (80, 260234), (104, 200180), (130, 160144), (160, 130117), (208, 100090), (260, 80072), (416, 50045), (520, 40036), (1040, 20018), (2080, 10009)]