399228880

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{211}}^1\times {\mathrm{353}}^1$

素因数の和:644

約数の個数: 80

約数和(自身を含む): 949207104

約数和(自身を除く): 549978224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 211, 268, 335, 353, 422, 536, 670, 706, 844, 1055, 1072, 1340, 1412, 1688, 1765, 2110, 2680, 2824, 3376, 3530, 4220, 5360, 5648, 7060, 8440, 14120, 14137, 16880, 23651, 28240, 28274, 47302, 56548, 70685, 74483, 94604, 113096, 118255, 141370, 148966, 189208, 226192, 236510, 282740, 297932, 372415, 378416, 473020, 565480, 595864, 744830, 946040, 1130960, 1191728, 1489660, 1892080, 2979320, 4990361, 5958640, 9980722, 19961444, 24951805, 39922888, 49903610, 79845776, 99807220, 199614440, 399228880]

約数ペア:

[(1, 399228880), (2, 199614440), (4, 99807220), (5, 79845776), (8, 49903610), (10, 39922888), (16, 24951805), (20, 19961444), (40, 9980722), (67, 5958640), (80, 4990361), (134, 2979320), (211, 1892080), (268, 1489660), (335, 1191728), (353, 1130960), (422, 946040), (536, 744830), (670, 595864), (706, 565480), (844, 473020), (1055, 378416), (1072, 372415), (1340, 297932), (1412, 282740), (1688, 236510), (1765, 226192), (2110, 189208), (2680, 148966), (2824, 141370), (3376, 118255), (3530, 113096), (4220, 94604), (5360, 74483), (5648, 70685), (7060, 56548), (8440, 47302), (14120, 28274), (14137, 28240), (16880, 23651)]