21261304

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{1021}}^1$

素因数の和:1183

約数の個数: 32

約数和(自身を含む): 42310800

約数和(自身を除く): 21049496

約数列:

[1, 2, 4, 8, 19, 38, 76, 137, 152, 274, 548, 1021, 1096, 2042, 2603, 4084, 5206, 8168, 10412, 19399, 20824, 38798, 77596, 139877, 155192, 279754, 559508, 1119016, 2657663, 5315326, 10630652, 21261304]

約数ペア:

[(1, 21261304), (2, 10630652), (4, 5315326), (8, 2657663), (19, 1119016), (38, 559508), (76, 279754), (137, 155192), (152, 139877), (274, 77596), (548, 38798), (1021, 20824), (1096, 19399), (2042, 10412), (2603, 8168), (4084, 5206)]