20464940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2617}}^1$

素因数の和:2666

約数の個数: 48

約数和(自身を含む): 47500992

約数和(自身を除く): 27036052

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2617, 3910, 5234, 7820, 10468, 13085, 26170, 44489, 52340, 60191, 88978, 120382, 177956, 222445, 240764, 300955, 444890, 601910, 889780, 1023247, 1203820, 2046494, 4092988, 5116235, 10232470, 20464940]

約数ペア:

[(1, 20464940), (2, 10232470), (4, 5116235), (5, 4092988), (10, 2046494), (17, 1203820), (20, 1023247), (23, 889780), (34, 601910), (46, 444890), (68, 300955), (85, 240764), (92, 222445), (115, 177956), (170, 120382), (230, 88978), (340, 60191), (391, 52340), (460, 44489), (782, 26170), (1564, 13085), (1955, 10468), (2617, 7820), (3910, 5234)]