19887399

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{599}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 16055001

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 599, 651, 1071, 1581, 1797, 1953, 3689, 4193, 4743, 5391, 10183, 11067, 12579, 18569, 30549, 33201, 37737, 55707, 71281, 91647, 129983, 167121, 213843, 315673, 389949, 641529, 947019, 1169847, 2209711, 2841057, 6629133, 19887399]

約数ペア:

[(1, 19887399), (3, 6629133), (7, 2841057), (9, 2209711), (17, 1169847), (21, 947019), (31, 641529), (51, 389949), (63, 315673), (93, 213843), (119, 167121), (153, 129983), (217, 91647), (279, 71281), (357, 55707), (527, 37737), (599, 33201), (651, 30549), (1071, 18569), (1581, 12579), (1797, 11067), (1953, 10183), (3689, 5391), (4193, 4743)]