20740940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4099}}^1$

素因数の和:4142

約数の個数: 48

約数和(自身を含む): 49593600

約数和(自身を除く): 28852660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 220, 230, 253, 460, 506, 1012, 1265, 2530, 4099, 5060, 8198, 16396, 20495, 40990, 45089, 81980, 90178, 94277, 180356, 188554, 225445, 377108, 450890, 471385, 901780, 942770, 1037047, 1885540, 2074094, 4148188, 5185235, 10370470, 20740940]

約数ペア:

[(1, 20740940), (2, 10370470), (4, 5185235), (5, 4148188), (10, 2074094), (11, 1885540), (20, 1037047), (22, 942770), (23, 901780), (44, 471385), (46, 450890), (55, 377108), (92, 225445), (110, 188554), (115, 180356), (220, 94277), (230, 90178), (253, 81980), (460, 45089), (506, 40990), (1012, 20495), (1265, 16396), (2530, 8198), (4099, 5060)]