388021360

素因数分解:

$2^4\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{2441}}^1$

素因数の和:4441

約数の個数: 40

約数和(自身を含む): 902973456

約数和(自身を除く): 514952096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1987, 2441, 3974, 4882, 7948, 9764, 9935, 12205, 15896, 19528, 19870, 24410, 31792, 39056, 39740, 48820, 79480, 97640, 158960, 195280, 4850267, 9700534, 19401068, 24251335, 38802136, 48502670, 77604272, 97005340, 194010680, 388021360]

約数ペア:

[(1, 388021360), (2, 194010680), (4, 97005340), (5, 77604272), (8, 48502670), (10, 38802136), (16, 24251335), (20, 19401068), (40, 9700534), (80, 4850267), (1987, 195280), (2441, 158960), (3974, 97640), (4882, 79480), (7948, 48820), (9764, 39740), (9935, 39056), (12205, 31792), (15896, 24410), (19528, 19870)]