257517640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{338839}}^1$

素因数の和:338869

約数の個数: 32

約数和(自身を含む): 609912000

約数和(自身を除く): 352394360

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 338839, 677678, 1355356, 1694195, 2710712, 3388390, 6437941, 6776780, 12875882, 13553560, 25751764, 32189705, 51503528, 64379410, 128758820, 257517640]

約数ペア:

[(1, 257517640), (2, 128758820), (4, 64379410), (5, 51503528), (8, 32189705), (10, 25751764), (19, 13553560), (20, 12875882), (38, 6776780), (40, 6437941), (76, 3388390), (95, 2710712), (152, 1694195), (190, 1355356), (380, 677678), (760, 338839)]