21319375

素因数分解:

$5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{443}}^1$

素因数の和:481

約数の個数: 40

約数和(自身を含む): 33289344

約数和(自身を除く): 11969969

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 125, 175, 275, 385, 443, 625, 875, 1375, 1925, 2215, 3101, 4375, 4873, 6875, 9625, 11075, 15505, 24365, 34111, 48125, 55375, 77525, 121825, 170555, 276875, 387625, 609125, 852775, 1938125, 3045625, 4263875, 21319375]

約数ペア:

[(1, 21319375), (5, 4263875), (7, 3045625), (11, 1938125), (25, 852775), (35, 609125), (55, 387625), (77, 276875), (125, 170555), (175, 121825), (275, 77525), (385, 55375), (443, 48125), (625, 34111), (875, 24365), (1375, 15505), (1925, 11075), (2215, 9625), (3101, 6875), (4375, 4873)]