21698608

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:685

約数の個数: 40

約数和(自身を含む): 44662320

約数和(自身を除く): 22963712

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 137, 152, 274, 304, 521, 548, 1042, 1096, 2084, 2192, 2603, 4168, 5206, 8336, 9899, 10412, 19798, 20824, 39596, 41648, 71377, 79192, 142754, 158384, 285508, 571016, 1142032, 1356163, 2712326, 5424652, 10849304, 21698608]

約数ペア:

[(1, 21698608), (2, 10849304), (4, 5424652), (8, 2712326), (16, 1356163), (19, 1142032), (38, 571016), (76, 285508), (137, 158384), (152, 142754), (274, 79192), (304, 71377), (521, 41648), (548, 39596), (1042, 20824), (1096, 19798), (2084, 10412), (2192, 9899), (2603, 8336), (4168, 5206)]